Have you added [Boards Manager](https://www.arduino.cc/en/guide/cores) installation support for an Arduino compatible board? Please let everyone know by publishing your [package index](https://arduino.github.io/arduino-cli/latest/package_index_json-specification/) URL.

<a id="list-of-3rd-party-boards-support-urls"></a>
### List of 3rd party Boards Manager URLs

* **Adafruit**: https://adafruit.github.io/arduino-board-index/package_adafruit_index.json
  * Adafruit AVR Boards (Flora, Metro, Trinket, Pro Trinket, & Gemma)
  * Adafruit SAMD Boards (Feather M0)
  * [TeeOnArdu](https://github.com/adafruit/TeeOnArdu) USB MIDI support for Leonardo & Micro
  * arcore USB MIDI support for Leonardo & Micro

* **Adelino**: https://raw.githubusercontent.com/neoautus/Adelino/762798ffd534436f3c28dc876ebc39256f0d5738/Platforms/Arduino/package_adelino_index.json
  * [Adelino](http://adelino.cc) is a _dual-microcontroller_ development board based on ATmega32U4 and ESP8266 (using ESP-12F WiFi module), inspired by Arduino Leonardo and Arduino Yún
  * Github repo: https://github.com/neoautus/Adelino

* **Adlink**: https://raw.githubusercontent.com/ADLINK/OT2IT/main/package_adlink_ot2it.json
  * [Adlink OT2IT Board](https://www.ipi.wiki/products/i-pi-ot2it), is a high-performance microcontroller that has a 32-bit ARM® Cortex®-M4 processor running at 120 MHz, 256 KB of SRAM and up to 1 MB Dual Panel Flash with ECC. A 10/100 Ethernet MAC and 2 CAN-FD ports provide connectivity for industrial automation, automotive, and general-purpose applications.

* **AirMCU** <https://github.com/Air-duino/Arduino-pack-json-ci/releases/download/Nightly/package_air_index.json> or <https://arduino.luatos.com/package_air_cn_index.json> (Users in China can use this link to avoid failing to install due to network factors)
  * [AirMCU](https://arduino.luatos.com/)is an Arduino-compatible development platform for AirM2M's ARM-Cortex architecture microprocessors.
  * We currently support the [Air001](https://air001.cn) and [Air32F103](https://air32.cn) series of microprocessors.

* **Akafugu**: https://raw.githubusercontent.com/akafugu/akafugu_core/master/package_akafugu_index.json
  * Akafugu Breadboard Adapter (Internal 8MHz Clock)
  * Akafugu Breadboard Adapter (External 16MHz Clock)
  * Akafuino L
  * Akafugu Nixie Clock

* **Alorium**: https://raw.githubusercontent.com/AloriumTechnology/Arduino_Boards/master/package_aloriumtech_index.json
  * [XLR8](http://www.aloriumtech.com/): FPGA accelerated AVR compatible Boards

* **AmbaSat-1 Satellite**: https://ambasat.com/boards/package_ambasat-1.com_index.json
  * [AmbaSat-1 Space Satellite](https://ambasat.com/): The Low Earth Orbit Space Satellite Development Kit

* **Ameba**:
  * **Ameba1 Family**: https://github.com/Ameba-AIoT/ameba-arduino-1/raw/dev/Arduino_package/package_realtek_ameba1_index.json
    * [Ameba1](https://github.com/Ameba-AIoT/ameba-arduino-1) SoC with WiFi
        * AMB01 (RTL8195AM)
        * AMB02 (RTL8710AF)
  * **AmebaD Family**: https://github.com/Ameba-AIoT/ameba-arduino-d/raw/dev/Arduino_package/package_realtek_amebad_early_index.json
    * [AmebaD](https://github.com/Ameba-AIoT/ameba-arduino-d) SoC with WiFi 2.4/5G and BLE 5.0
        * AMB21 (RTL8722DM)
        * AMB22 (RTL8722CSM)
        * AMB23 (RTL8722DM)
        * BW16 (RTL8720DN)
        * BW16-TypeC (RTL8720DN)
        * AW-CU488 Thing Plus (RTL8721DM)
        * AMB25 (RTL8720DF)
        * AMB26 (RTL8720DF)
  * **AmebaPro2 Family**: https://github.com/Ameba-AIoT/ameba-arduino-pro2/raw/dev/Arduino_package/package_realtek_amebapro2_early_index.json
    * [AmebaPro2](https://github.com/Ameba-AIoT/ameba-arduino-pro2) SoC with WiFi 2.4/5G, BLE 5.1, ISP H.264/H.265 encoder, and Integrated Intelligent Engine
        * AMB82-MINI (RTL8735B)
  * More information is [here](https://www.amebaiot.com/en/ameba-arduino-summary/)

* **Arduino MKR1000 - Beta**: http://downloads.arduino.cc/packages/package_mkr1000_index.json
  * Hackster.io - MKR1000 Build
  * This appears to be seriously outdated. MKR1000 support has long since been added to the standard Arduino SAMD Boards package available in Boards Manager without adding a 3rd party URL. Possibly this version was written for the beta test version of the MKR1000, which had a different pinout than the final version of the board?

* **Arachnid Labs**: https://raw.githubusercontent.com/arachnidlabs/arachnidlabs-boards/master/package_arachnidlabs.com_boards_index.json
  * Tsunami (http://www.arachnidlabs.com/tsunami/) Signal generator based on Arduino Leonardo (AD9838)

* **Ardhat**: https://ardhat.github.io/ardhat-board-support/arduino/package_ardhat_index.json
  * [Ardhat forums](http://forums.ardhat.com)

* **Arduboy**: https://arduboy.github.io/board-support/package_arduboy_index.json
  * [Arduboy](https://www.arduboy.com/) miniature game system and developer kit

* **Arducam**: http://www.arducam.com/downloads/ESP8266_UNO/package_ArduCAM_index.json
  * Arducam ESP8266 UNO
  * Arducam ESP32S UNO (http://www.arducam.com/downloads/ESP32_UNO/package_ArduCAM_ESP32S_UNO_index.json)

* **Ariadne Bootloader**: https://per1234.github.io/Ariadne-Bootloader/package_codebendercc_ariadne-bootloader_index.json
  * Arduino Ethernet/Ethernet Shield/W5100 bootloader

* **Arrow**: https://raw.githubusercontent.com/ioteamit/smarteverything-core/master/package_arrow_index.json
  * SmartEverything Fox
  * SmartEverything Lion
  * SmartEverything Dragonfly
  * SmartEverything Tiger

* **ATFlash**: https://mesom.de/atflash/package_atflash_index.json
  * Engage the following controllers with 8 MHz (and 9600 Baud) standalone on breadboard (without _anything_ else!):
  * ATtiny84A
  * ATtiny85
  * ATmega328P
  * All can be programmed via an UNO and the integrated Tiny Safe Boot (TSB) bootloader or the integrated ISP programming
  * More on [the ATFlash website](https://mesom.de/atflash/index_english.html)

* **ATmega & ATtiny cores**: http://www.leonardomiliani.com/repository/package_leonardomiliani.com_index.json
  * ATmega644/644P & ATmega1284P core (w/bootloader)
  * ATmega168P/328P core (for standalone MCUs)
  * ATtiny24/44/84, ATtiny25/45/85, and ATtiny2313/4313 core (I2C & SoftSerial)

* **ATmegaxxM1-C1**: https://thomasonw.github.io/ATmegaxxM1-C1/package_thomasonw_ATmegaxxM1-C1_index.json
  * ATmega32M1
  * ATmega64M1
  * Others to come.

* **ATtiny**: https://raw.githubusercontent.com/damellis/attiny/ide-1.6.x-boards-manager/package_damellis_attiny_index.json
  * ATtiny45 / ATtiny85 and ATtiny44 / ATtiny84 support

* **ATtinyCore**: http://drazzy.com/package_drazzy.com_index.json
  * ATtiny25/45/85, 24/44/85, 261/461/861, 87/167, 48/88, 2313/4313
  * ATtiny441/841, 1634, 828 (optiboot support on 841/1634/828)

* **ATtinyCore (Debug enabled)**: https://felias-fogg.github.io/ATTinyCore/package_drazzy.com_ATTinyCore_index.json
  * ATTinyCore 1.5.2 by Spence Konde in a debug-enabled version
  * ATtiny25/45/85, 24/44/85, 261/461/861, 87/167, 48/88, 2313/4313
  * ATtiny441/841, 1634, 828 

* **AutomationDirect.com**: https://raw.githubusercontent.com/facts-engineering/facts-engineering.github.io/master/package_productivity-P1AM-boardmanagermodule_index.json
  * [P1AM-100](https://facts-engineering.github.io/) The ProductivityOpen P1AM-100 is an automation platform compatible with Productivity1000 Series I/O modules, P1AM Series shields, and Arduino MKR format shields.

* **avdweb**: https://raw.githubusercontent.com/avandalen/SAM15x15/master/package_avdweb_nl_index.json
  * [SAM 15x15](http://www.avdweb.nl/arduino/samd21/sam-15x15.html): Arduino Zero compatible board

* **avr_boot**: https://zevero.github.io/avr_boot/package_zevero_avr_boot_index.json
  * SD card bootloader for ATmega processors:
    * [List of supported microcontrollers](https://github.com/zevero/avr_boot/tree/gh-pages#supported-microcontrollers)
    * [List of supported boards](https://github.com/zevero/avr_boot/tree/gh-pages#supported-boards)

* **Axiometa**: https://raw.githubusercontent.com/axiometa/axiometa_boards_firmware/refs/heads/main/package_axiometa_index.json
    * Axiometa Core 1
    * Axiometa Core WiFi

* **Azure IoT Hub (MXChip)**: https://raw.githubusercontent.com/VSChina/azureiotdevkit_tools/master/package_azureboard_index.json
  * AZ3166 v1.0
  * [Azure IoT Hub](https://microsoft.github.io/azure-iot-developer-kit/)

* **Barebones ATmega Chips (no bootloader)**: https://raw.githubusercontent.com/carlosefr/atmega/master/package_carlosefr_atmega_index.json
  * ATmega8/168/168P/328/328P (internal and external clocks)

* **Bouffalo Lab (Official)**: 
https://github.com/bouffalolab/arduino-bouffalo/releases/latest/download/package_bouffalolab_index.json
  * [GitHub - Bouffalo Lab Offical](https://github.com/bouffalolab/arduino-bouffalo)
  * BL616/BL618 
  * Variants 
    * Ai Thinker Ai-Voice Ai-M61-32S & Ai-M62-32S [ GitHub - Ai Thinker ](https://github.com/Ai-Thinker-Open)
    * Sipeed M0sDock(bl616) & M0pDock(bl618) [ GitHub - Sipeed ](https://github.com/orgs/sipeed/repositories)

* **Breadboard Arduino**: https://raw.githubusercontent.com/oshlab/Breadboard-Arduino/master/avr/boardsmanager/package_oshlab_breadboard_index.json
  * [GitHub - Breadboard-Arduino](https://github.com/oshlab/Breadboard-Arduino)
  * ATmega328P (8 MHz internal)

* **Cadx Board for avr** : https://novation.ai/robotics-diy/Cadxcore.json
  * NovationBrain
  * Atmega 8A 

* **Canique**: https://resources.canique.com/ide/package_canique_index.json
  * [Canique MK1](https://www.canique.com/mk1)

* **chip45**: https://raw.githubusercontent.com/beegee-tokyo/Crumbuino-Chip45/main/package_crumbuino_index.json
  * Crumbuino Modules: https://github.com/beegee-tokyo/Crumbuino-Chip45
    * [Crumbuino-Nano (ATmega328P)](https://www.chip45.com/arduino-nano-module.html)
    * [Crumbuino-NMega (ATmega2560)](https://www.chip45.com/arduino-mega-module.html)

* **chipKIT**: https://github.com/chipKIT32/chipKIT-core/raw/master/package_chipkit_index.json
  * Microchip PIC32 based boards
  * All supported chipKIT boards including UNO32, MAX32, uC32, Fubarino SD, Fubarino Mini, WF32, WiFire, etc.
  * Main chipKIT.net site http://chipkit.net/
  * chipKIT forums http://chipkit.net/forum

* **Circuitneato**: https://circuitneato.github.io/package_circuitneatoboards_index.json
  * Circuitneato AVR Boards (Tineato 3226)
  * Circuitneato ARM Boards (STM32 Keyboard Controller)

* **ClearCore**: https://www.teknic.com/files/downloads/package_clearcore_index.json
  * Teknic ClearCore
    * A specialized motion and I/O controller that can control up to 4 axes of point-to-point motion (servos and stepper drives) with 13 points of mixed analog and digital industrial 24V I/O.
    * C++ programmable, with Arduino wrapper
    * [More info](https://www.teknic.com/products/io-motion-controller/)
    * [Documentation](https://teknic-inc.github.io/ClearCore-library/)

* **clkdiv8**: http://clkdiv8.com/download/package_clkdiv8_index.json
  * Sparrow V4 Board: [http://clkdiv8.com](https://clkdiv8.com/wiki/doku.php)

* **Cosa**: https://raw.githubusercontent.com/mikaelpatel/Cosa/master/package_cosa_index.json
  * AdaFruit ATmega32U4
  * Anarduino MiniWireless
  * Arduino Diecimila
  * Arduino Duemilanove
  * Arduino Leonardo
  * Arduino Mega 1280
  * Arduino Mega 2560
  * Arduino Micro
  * Arduino Nano
  * Arduino Pro Micro
  * Arduino Pro Mini
  * Arduino Uno
  * Breadboards: ATtinyX4, ATtinyX5, ATtinyX61, ATmega328, ATmega1284
  * ITEAD Studio IBoard
  * LilyPad Arduino
  * LilyPad Arduino USB
  * Moteino
  * Moteino Mega
  * Pinoccio Scout
  * Microduino-Core
  * Microduino-Core32u4
  * Microduino-Core+
  * PJRC Teensy 2.0
  * PJRC Teensy++ 2.0
  * Wicked Device WildFire V3

* **Cytron Technologies**: https://raw.githubusercontent.com/CytronTechnologies/Cytron-Arduino-URL/master/package_cytron_index.json
  * Cuteduino
  * CT UNO

* **DFRobot**: https://raw.githubusercontent.com/DFRobot/DFRobotDuinoBoard/master/package_dfrobot_index.json
  * Bluno M0 MainBoard(Nuc123LD4AN0)  * NUC123LD4AN0/P/PA/A
  * DFRduino M0 MainBoard(Nuc123LD4AN0) * NUC123LD4AN0/P/PA/A
  * Bluno M3 MainBoard(STM32) STM32/P/PA/A

* **DFRobotIot**: https://raw.githubusercontent.com/DFRobot/DFRobotDuinoBoard/master/package_dfrobot_iot_mainboard.json
  * DFRobot 8266 Iot Mainboard (ESP8266)

* **DFRobot ESP32 Iot**: https://git.oschina.net/dfrobot/FireBeetle-ESP32/raw/master/package_esp32_index.json
  * DFRobot ESP32 Iot Mainboard (Firebeetle ESP32 SKU: DFR0478)

* **DFRobot ESP32 v0.2+**: https://gist.githubusercontent.com/lion2486/15b73228438756521e33d5c13cd777b6/raw/a65719862523455e3bb820e52731b9c72b8e864a/DFRobot_index.json

* **Digistump (Official)**: http://digistump.com/package_digistump_index.json
  * Digispark (16.5 MHz)
  * Digispark Pro (16 MHz)
  * Digispark Pro (16 MHz) (32 byte buffer)
  * Digispark Pro (16 MHz) (64 byte buffer)
  * Digispark (16 MHz - No USB)
  * Digispark (8 MHz - No USB)
  * Digispark (1 MHz - No USB)
  * Digistump DigiX
  * Note: Includes driver installer for Windows installs

* **Digistump maintained**: https://raw.githubusercontent.com/ArminJo/DigistumpArduino/master/package_digistump_index.json
  * Digispark (all frequencies)
  * Digispark Pro (16 MHz)
  * MH-ET LIVE Tiny88 (16 MHz ATTinyCore)

* **Dwengo**: http://www.dwengo.org/sites/default/files/package_dwengo.org_dwenguino_index.json
  * Dwenguino (http://www.dwengo.org/tutorials/dwenguino/dwenguino-board)

* **EBot Arduino core**: https://raw.githubusercontent.com/sanu-krishnan/ebot-arduino-core/master/package_ebots.cc_index.json
  * based on ATmega1284P

* **Electronica Elemon**: https://raw.githubusercontent.com/MauricioJancic/Elemon/master/package_Elemon_index.json
  * EESA-IOT 5.0 v1.0 more info in http://www.elemon.com.ar/NovedadesDet.aspx?Id=56

* **Elektor**
  * Elektor.Labs [support](http://www.elektor-labs.com), [main site](http://www.elektor.com)
  * Elektor Uno R4 (ATmega328PB, [project page](https://www.elektormagazine.com/labs/elektorino-uno-r4-150790)): https://github.com/ElektorLabs/Arduino/releases/download/v1.0.1/package_elektor_uno_r4_1_8_x_index.json
  * Platino Universal AVR Board (supports 28-pin and 40-pin devices), [project page](https://www.elektormagazine.com/labs/platino-versatile-board-for-avr-microcontrollers-100892-150555)) 
  * AVR Playground (dev board with many peripherals + mikroe Click slot, [project page](https://www.elektormagazine.com/labs/avr-playground-129009-2))
  * eRIC Nitro (with on-board LPRS radio module), [project page](https://www.elektormagazine.com/labs/eric-nitro-150308)):
  https://github.com/ElektorLabs/Arduino/releases/download/v1.0.1/package_elektor_index.json

* **Engimusing**: https://engimusing.github.io/arduinoIDE/package_engimusing_modules_index.json
  * Engimusing has a variety of small boards which are centered around the Silicon Labs Gecko microprocessors.
  * More information can be found at https://www.engimusing.com.
  * EFM32G232
  * EFM32TG110
  * EFM32TG222
  * EFM32WG840
  * EFM32ZG108
  * EFM32ZG222
  * EFM32ZGUSB
* **ESP8266 Community**: This is the URL for the ESP8266 board package that you can add to the Arduino IDE: https://arduino.esp8266.com/stable/package_esp8266com_index.json

  * Generic ESP8266 modules
  * Olimex MOD-WIFI-ESP8266
  * NodeMCU 0.9 (ESP-12)
  * NodeMCU 1.0 (ESP-12E)
  * Adafruit HUZZAH ESP8266 (ESP-12)
  * SparkFun Thing
  * SweetPea ESP-210
  * WeMos D1
  * WeMos D1 mini

* **Espressif ESP32**: https://espressif.github.io/arduino-esp32/package_esp32_index.json
  * Many variants of ESP32 boards - ESP32, -S2, -S3, -C3
  * See wiki at https://docs.espressif.com/projects/arduino-esp32/en/latest/getting_started.html

* **Explore-M3**: https://raw.githubusercontent.com/ExploreEmbedded/Explore-M3/master/package_ExploreM3_index.json
  * NXP LPC1768 based Explore Embedded's Explore-M3 board
  * [GitHub - In System MCU](https://github.com/ExploreEmbedded/Explore-M3/)

* **FemtoCow**: https://raw.githubusercontent.com/FemtoCow/ATTinyCore/master/Downloads/package_femtocow_attiny_index.json
  * ATtiny84, ATtiny85, ATtiny861, ATtiny167, ATtiny2313, ATtiny88

* **FPGArduino**: http://www.nxlab.fer.hr/fpgarduino/package_f32c_core_index.json
  * ULX3S (Lattice ECP5 12F/25F/45F/85F)
  * ULX2S SRAM
  * Lattice FleaFPGA-Uno (Fleasystems Lattice MachXO2-7000HC)
  * Lattice Brevia / Brevia2
  * Mikroprojekt Kondor AX Lattice ECP5
  * Mikroprojekt Sparrowhawk FX Lattice ECP3
  * ReVerSE-U16 (Altera Cyclone-IV)
  * Spartan-3 (3E, 3A, 3AN) Starter Kits
  * Terasic DE0-Nano
  * Terasic DE10-Lite (Altera MAX 10)
  * Altera TB276 Board
  * Basys-3
  * Digilent ZYBO
  * E2LP
  * Nexys-3
  * Xilinx ESA11 Artix-7 board
  * Xilinx Scarab Hardware miniSpartan6+ Board
  * Xilinx Numato Mimas V2 Spartan-6
  * Xilinx Posedge-One Spartan-6
  * Xilinx TB299 Board
  * FPGArduino Generic f32c SoC

* **ftDuino**: https://raw.githubusercontent.com/harbaum/ftduino/master/package_ftduino_index.json
  * [ftDuino fischertechnik compatible controller](http://ftduino.de)

* **Goldilocks 1284p**: https://raw.githubusercontent.com/feilipu/feilipu.github.io/master/package_goldilocks_index.json
  * Goldilocks 20MHz
  * Goldilocks 22.1184MHz
  * Goldilocks Analogue (24.576MHz, integrated MCP4822 DAC & Headphone Amp, Mic Amp for ADC, SPI SRAM & EEPROM)

* **HidnSeek**: http://hidnseek.github.io/hidnseek/package_hidnseek_boot_index.json
  * Main HidnSeek site: https://hidnseek.fr
  * An ATmega328P for IoT in low power mode with USB Battery charger, GPS, Accelerometer, Temperature, Pressure, Sigfox RF link (w/USB boot loader)

* **In System MCU**:  http://www.bamfordresearch.com/files/package_jb23_insystemmcu_index.json
  * Support for the following configurations in-system or on a breadboard:
    * ATmega328P (8-16+ MHz Crystal)
    * ATmega328P (8 MHz Internal)
  * With options for setting the CKDIV8 clock division fuse.
  * [GitHub - In System MCU](https://github.com/jb-23/in-system-mcu)

* **In-Circuit**: http://library.radino.cc/Arduino_1_8/package_radino_radino32_index.json
  * radino32 DW1000
  * radino32 SX1272
  * radino32 CC1101
  * radino32 WiFi
  * radino32 nRF8001
  * radino CC1101
  * radino WiFi
  * radino nRF8001
  * radino RF69
  * radino RF233

* **Infineon Technologies**: https://github.com/Infineon/Assets/releases/download/current/package_infineon_index.json
  * GitHub Project: https://github.com/Infineon/XMC-for-Arduino
  * Supported Boards:
    * [XMC 2Go](https://www.infineon.com/cms/en/product/evaluation-boards/KIT_XMC_2GO_XMC1100_V1/productType.html?productType=db3a304443537c4e01436ccecb5d154f)
    * [XMC1100 Boot Kit](https://www.infineon.com/cms/en/product/evaluation-boards/KIT_XMC11_BOOT_001/productType.html?productType=db3a30443b360d0e013b8f5163c46f62#ispnTab1)
    * [XMC4700 Relax Kit](https://www.infineon.com/cms/en/product/evaluation-boards/KIT_XMC47_RELAX_LITE_V1/productType.html?productType=5546d46250cc1fdf0150f6a2788e6e89)

* **IntoRobot**: https://github.com/IntoRobot/IntoRobotPackages-ArduinoIDE/releases/download/1.0.0/package_intorobot_index.json
  * IntoRobot-Atom (STM32F103)
  * IntoRobot-Neutron (STM32F411)
  * IntoRobot-Nut (ESP8266)
  * IntoRobot-Fig (ESP32)

* **IOTEAM**: https://raw.githubusercontent.com/ioteamit/ioteam-arduino-core/master/package_ioteam_index.json
  * Dustino

* **Iteaduino Lite**: https://raw.githubusercontent.com/udif/ITEADSW_Iteaduino-Lite-HSP/master/package/package_iteaduino_lite_index.json
  * [Iteaduino Lite](https://www.itead.cc/wiki/Iteaduino_Lite) is a cheap Arduino clone (no longer sold), which is based on an ATmega88 chip clone called LGT8F88A.
  * This package is fork of the original ITead GitHub repository which was intended to be manually installed over an Arduino 1.0.x or 1.5.x and did not contain a JSON based plugin release.

* **Kristian Sloth Lauszus**: https://raw.githubusercontent.com/Lauszus/Sanguino/master/package_lauszus_sanguino_index.json
  * Sanguino

* **Hologram Dash/DashPro (Official)**: http://downloads.hologram.io/arduino/package_konekt_index.json
  * Cortex M4-based global cellular dev kits, support for all board variants, support for USB and over-the-air programming straight from within Arduino IDE. Formerly "Konekt".
  * GitHub: https://github.com/HologramEducation/hologram-dash-arduino-integration
  * Tutorial: https://www.hologram.io/guides/dash-programming-and-firmware

* **Laika**: https://raw.githubusercontent.com/eightdog/laika_arduino/master/IDE_Board_Manager/package_project_laika.com_index.json
  * Laika Explorer:
    * ATmega88PA

* **Lattuino**: http://fpgalibre.sf.net/Lattuino/package_lattuino_index.json
  * Lattuino is an Arduino implementation using an iCE40 FPGA
  * Is compatible with Arduino UNO, but with less memory
  * Web page: http://fpgalibre.sourceforge.net/Lattuino_en/index.html
  * FPGA board used: http://fpgalibre.sourceforge.net/Kefir_en/index.html
  * Lattuino IP and API: https://github.com/INTI-CMNB/Lattuino_IP_Core
  * Support IP cores: https://github.com/FPGALibre/fpgacores

* **LinkIt ONE (Seeed Studio)**: http://download.labs.mediatek.com/package_mtk_linkit_index.json
  * MediaTek v1.0

* **LinkIt Smart 7688 Duo (Seeed Studio)**: http://download.labs.mediatek.com/package_mtk_linkit_smart_7688_index.json
  * LinkIt Smart 7688 Duo(ATmega32U4)(3.3V)(8MHz)

* **LinkIt 7697**: http://download.labs.mediatek.com/package_mtk_linkit_7697_index.json
  * LinkIt 7697

* **LGT8F328P**: https://raw.githubusercontent.com/dbuezas/lgt8fx/master/package_lgt8fx_index.json
  * Clone of the atmega328 by Logic Green

* **M5Stack**: https://m5stack.oss-cn-shenzhen.aliyuncs.com/resource/arduino/package_m5stack_index.json
  * [M5StickC](https://docs.m5stack.com/en/core/m5stickc) (ESP32)
  * [M5StickC PLUS](https://docs.m5stack.com/en/core/m5stickc_plus) (ESP32-PICO-D4)
  * [M5Core2](https://docs.m5stack.com/en/core/core2) (ESP32)
  * [Core2 for AWS](https://docs.m5stack.com/en/core/core2_for_aws)
  * [TOUGH](https://docs.m5stack.com/en/core/tough)

* **Macchina**: https://macchina.cc/package_macchina_index.json
  * [Macchina M2](https://www.macchina.cc/)

* **Move-Xduino by [Move-X](https://www.move-x.it/)**: https://github.com/Move-X/Move-Xduino/raw/main/package_move-x_index.json
  * Provide support of the following MAMWLE based boards:
    * [MAMWLE-XX](https://www.move-x.it/mamwle-module/)
    * [Cicerone Board](https://www.move-x.it/cicerone-board/)

* **MassDuino**: https://raw.githubusercontent.com/dimag0g/massduino_boards/master/package_massduino_index.json
  * MassDuino UNO Pro (MD3248P-LQFP48)
  * MassDuino UNO (MD3208P-LQFP32)
  * MassDuino UNO LC (MD328D-LQFP32)
  * MassDuino UNO R4 (MD88D-SSOP20)

* **MattairTech LLC**: https://www.mattairtech.com/software/arduino/package_MattairTech_index.json
  * MT-D21E (ATSAMD21ExxA)
  * MT-D11 (ATSAMD11D14AM)
  * MT-DB-U1 (AT90USB162)
  * MT-DB-U2 (ATmega32U2)
  * MT-DB-U4 (ATmeaga32U4)
  * MT-DB-U6 (AT90USB646/AT90USB1286)

* **Maxim Integrated**: https://raw.githubusercontent.com/MaximIntegratedMicros/arduino-collateral/master/package_maxim_index.json
  * GitHub Project: https://github.com/MaximIntegratedMicros/arduino-max326xx
  * Supported Boards:
    - [MAX32620FTHR](https://www.maximintegrated.com/en/products/microcontrollers/MAX32620FTHR.html)
    - [MAX32625MBED](https://www.maximintegrated.com/en/products/microcontrollers/MAX32625MBED.html)
    - [MAX32630FTHR](https://www.maximintegrated.com/en/products/microcontrollers/MAX32630FTHR.html)

* **MegaCore**: https://mcudude.github.io/MegaCore/package_MCUdude_MegaCore_index.json
  * ATmega2561/V
  * ATmega2560/V
  * ATmega1281/V
  * ATmega1280/V
  * ATmega640/V
  * ATmega128/L/A
  * ATmega64/L/A

* **MicroCore**: https://mcudude.github.io/MicroCore/package_MCUdude_MicroCore_index.json
  * ATtiny13

* **MightyCore**: https://mcudude.github.io/MightyCore/package_MCUdude_MightyCore_index.json
  * ATmega1284/P
  * ATmega644/P/PA/A
  * ATmega324P/PA/A
  * ATmega164P/PA/A
  * ATmega32
  * ATmega16
  * ATmega8535

* **MiniCore**: https://mcudude.github.io/MiniCore/package_MCUdude_MiniCore_index.json
  * ATmega328/P/PA/A
  * ATmega168/P/PA/A
  * ATmega88/P/PA/A
  * ATmega48/P/PA/A
  * ATmega8

* **Moteino (Official)**: https://lowpowerlab.github.io/MoteinoCore/package_LowPowerLab_index.json  
  * Moteino (16 MHz)
  * MoteinoMEGA (16 MHz)
  * [All about Moteino](http://lowpowerlab.com/moteino)

* **Move38**: https://boardsmanager.com/package_move38.com-blinks_index.json
  * [blink](https://move38.com/pages/developer)

* **Navspark**: http://navspark.mybigcommerce.com/content/package_navspark_index.json
  * Navspark-GL: Arduino Compatible Development Board with GPS/GLONASS
  * NavSpark: Arduino Compatible Development Board with GPS

* **NeKuNeKo**: https://nekuneko.github.io/arduino-board-index/package_nekuneko_index.json
  * SoK Zero Dawn (SAMD21J18A)
  * SoK M4 Advance (SAMD51J20A)

* **NicoHood HoodLoader2**: https://raw.githubusercontent.com/NicoHood/HoodLoader2/master/package_NicoHood_HoodLoader2_index.json
  * ATmega16U2
  * ATmega32U2
  * ATmega8U2
  * AT90USB162
  * Original ATmega16U2 DFU Firmware
  * Arduino Uno HID-Bridge
  * Arduino Mega 2560 HID-Bridge

* **Nordic Semiconductor nRF5 based boards**: https://sandeepmistry.github.io/arduino-nRF5/package_nRF5_boards_index.json
  * GitHub Project: https://github.com/sandeepmistry/arduino-nRF5
  * RedBearLab Project (deprecated): https://github.com/redbear/nRF5x
  * Plain nRF52 MCU Supported Boards:
    * Nordic Semiconductor nRF52 DK
      * Shenzhen Taida Century Technology nRF52 low cost development board
      * RedBear Blend 2
      * RedBear Nano 2
    * nRF51 Supported Boards:
      * Plain nRF51 MCU
      * BBC micro:bit
      * Bluz DK
      * Nordic Semiconductor nRF51822 Development Kit + nRF51422 Development Kit
      * PCA10000
      * PCA10001, PCA10002, PCA10003, PCA10004 via nRF6310(nRFgo)
      * Nordic Semiconductor NRF51 Dongle
      * OSHChip
      * RedBearLab BLE Nano
      * RedBearLab nRF51822
      * Waveshare BLE400
      * ng-beacon
      * Seeedstudio Tinyble

* **ArduinoNRF** (nRF52840/nRF52833 bare-metal core): https://raw.githubusercontent.com/dunknowcoding/ArduinoNRF/main/package_arduinonrf_index.json
  * GitHub: https://github.com/dunknowcoding/ArduinoNRF
  * Maintainer: dunknowcoding (YouTube: NiusRobotLab)
  * AliExpress ProMicro nRF52840
  * nice!nano v2
  * SuperMini nRF52840
  * nRFMicro nRF52840
  * Mini nRF52840
  * XIAO-like nRF52840
  * Generic nRF52840 Development Board
  * Generic nRF52833 Development Board
  * Pitaya Go nRF52840
  * nRF52840 USB Dongle

* **Northern Widget**: https://raw.githubusercontent.com/NorthernWidget/Arduino_Boards/master/package_NorthernWidget_index.json
  * ALog BottleLogger (legacy)
  * ALog BottleLogger v2
  * ATMega644p 8MHz
  * ATMega1284p 8MHz

* **NXP FRDM MCX Series (mcx-arduino-core)**: https://raw.githubusercontent.com/teddokano/mcx-arduino-core/main/package_nxp_mcx_index.json
  * GitHub: https://github.com/teddokano/mcx-arduino-core
  * FRDM-MCXA153 (NXP Cortex-M33)
  * FRDM-MCXN947 (NXP Cortex-M33)

* **OLIMEX**:
  * **OLIMEX (AVR BOARDS)**: https://raw.githubusercontent.com/OLIMEX/Arduino_configurations/master/AVR/package_olimex_avr_index.json
    * Examples for OLIMEX AVR Arduino-like boards (OLIMEXINO-328, OLIMEXINO-32U4, OLIMEXINO-NANO, etc)
    * Examples for OLIMEX AVR Digispark-like boards (OLIMEXINO-85, OLIMEXINO-85S, OLIMEXINO-85BC, FOSDEM-85, etc)
    * Libraries and examples for various OLIMEX shields and UEXT extension boards (MOD-LCD1x9, SHIELD-LCD16x2, MOD-IO2, etc)
  * **OLIMEX (PIC BOARDS)**: https://raw.githubusercontent.com/OLIMEX/Arduino_configurations/master/PIC/package_olimex_pic_index.json
    * Examples for PIC32-PINGUINO, PIC32-PINGUINO-OTG
    * Library and examples for OLIMEX UEXT extension board (MOD-GPS)
    * Note: Since the tools (compiler, uploader, drivers) are from chipKIT's package you have to add their *.json file (https://github.com/chipKIT32/chipKIT-core/raw/master/package_chipkit_index.json) in the list of "Additional Boards Managers URLs" (installation of chipKIT's package is not required).
  * **OLIMEX (STM BOARDS)**: https://raw.githubusercontent.com/OLIMEX/Arduino_configurations/master/STM/package_olimex_stm_index.json
    * Examples for OLIMEX STM32-E407

* **PJRC**: https://www.pjrc.com/teensy/package_teensy_index.json
  * [Teensy LC/2/3/4](https://www.pjrc.com/) Teensy LC, 2.0, 2.0++, 3.X, & 4.X

* **OMC**: https://raw.githubusercontent.com/ThamesValleyReprapUserGroup/Beta-TVRRUG-Mendel90/master/Added-Documents/OMC/package_omc_index.json
  * [OMC](http://www.tvrrug.org.uk/): Open Motion Controller

* **ROBOTIS**: https://raw.githubusercontent.com/ROBOTIS-GIT/OpenCR/master/arduino/opencr_release/package_opencr_index.json

* **Open Panzer**: https://openpanzerproject.github.io/OpenPanzerBoards/package_openpanzer_index.json
  * [TCB (Tank Control Board)](https://github.com/OpenPanzerProject/TCB) with ATmega2560 processor

* **OpenTracker**: https://raw.githubusercontent.com/geolink/opentracker-arduino-board/master/package_opentracker_index.json
  * GeoLink [OpenTracker](https://geolink.io/opentracker.php)

* **panStamp**: http://panstamp.org/arduino/package_panstamp_index.json
  * [panStamp AVR](https://github.com/panStamp/panstamp/wiki/panStamp-AVR-2.-Technical-details) w/ ATmega328P
  * [panStamp NRG](https://github.com/panStamp/panstamp/wiki/panStamp-NRG-2.-Technical-details) w/ CC430F5137 (TI MSP430 core + CC1101)

* **Pololu**: https://files.pololu.com/arduino/package_pololu_index.json
  * [Pololu A-Star Programmable Controllers](https://www.pololu.com/category/149/a-star-programmable-controllers)

* **Quirkbot**: https://raw.githubusercontent.com/Quirkbot/QuirkbotArduinoHardware/master/package_quirkbot.com_index.json
  * [Quirkbot](http://quirkbot.com) support

* **RAKWireless**: https://raw.githubusercontent.com/RAKwireless/RAKwireless-Arduino-BSP-Index/main/package_rakwireless_index.json
  * [RAKWireless](https://www.rakwireless.com) board support

* **Raspberry Pi RP2040 Boards**: https://github.com/earlephilhower/arduino-pico/releases/download/global/package_rp2040_index.json
  * All major RP2040-based boards

* **RedBear**: https://redbearlab.github.io/arduino/package_redbear_index.json
  * RedBear Duo (Cortex-M3, WiFi + BLE)

* **RedBearLab**: https://redbearlab.github.io/arduino/package_redbearlab_index.json
  * RedBearLab AVR+BLE ([ATmega32U4](http://www.atmel.com/devices/atmega32u4.aspx) + [nRF8001](https://www.nordicsemi.com/Products/Low-power-short-range-wireless/nRF8000-series)) Boards (Blend and Blend Micro).

* **Renesas/NEC**: (https://github.com/renesas/Arduino/wiki)
  * RL78/G24: https://raw.githubusercontent.com/renesas/Arduino/master/hardware/package_renesas_rl78g24_fpb_index.json
  * RL78/G23-64p: https://raw.githubusercontent.com/renesas/Arduino/master/hardware/package_renesas_rl78g23_fpb_p64_index.json
  * RL78/G22: https://raw.githubusercontent.com/renesas/Arduino/master/hardware/package_renesas_rl78g22_fpb_index.json
  * RL78/G16: https://raw.githubusercontent.com/renesas/Arduino/master/hardware/package_renesas_rl78g16_fpb_index.json
  * RL78/G15: https://raw.githubusercontent.com/renesas/Arduino/master/hardware/package_index_rl78g15_fpb_p20_bundled.json

* **Riddle&Code Ltd.**: https://raw.githubusercontent.com/RiddleAndCode/RnCAtmega256RFR2/master/Board_Manager/package_rnc_index.json
  * ATmega256RFR2 Xplained Pro Evaluation Kit (Complete package including bootloader)

* **RIG by REKA**: http://rig.reka.com.my/package_rig_index.json
  * [RIG Cell Lite](https://reka.com.my/metier/artifact/rig/) Cellular Based IoT Board

* **RobotCing**: https://raw.githubusercontent.com/RobotCing/Cing/master/Software/Packages/package_RobotCing_index.json
  * ATtiny85
  * ATtiny84
  * ATmega8
  * ATmega328
  * ATmega32U4

* **Seeed Studio**:
  * **Seeeduino**: https://raw.githubusercontent.com/Seeed-Studio/Seeed_Platform/master/package_legacy_seeeduino_boards_index.json
      * [Seeeduino V4.2(ATmega328P)](https://www.seeedstudio.com/Seeeduino-V4-2-p-2517.html)
      * [Seeeduino Mega 2560](https://www.seeedstudio.com/Seeeduino-Mega-ATmega2560.html)
      * [Seeeduino V4(ATmega328P)](https://www.seeedstudio.com/Seeeduino-V4-p-669.html)
      * [Seeeduino Lotus](https://www.seeedstudio.com/Seeeduino-Lotus-V1-1-ATMega328-Board-with-Grove-Interface.html)
      * [Seeeduino Lite](https://www.seeedstudio.com/Seeeduino-Lite.html)
  * **Seeed SAMD Boards**: https://files.seeedstudio.com/arduino/package_seeeduino_boards_index.json
      * [Wio Terminal](https://www.seeedstudio.com/Wio-Terminal-p-4509.html)
      * [Seeeduino XIAO](https://www.seeedstudio.com/Seeeduino-XIAO-Arduino-Microcontroller-SAMD21-Cortex-M0+-p-4426.html)
      * Seeeduino Zero
          * [Seeeduino Cortex-M0+](https://www.seeedstudio.com/Seeeduino-Cortex-M0-p-4070.html)
          * [Seeeduino Lotus Cortex-M0+](https://www.seeedstudio.com/Seeeduino-Lotus-Cortex-M0-p-2896.html)
          * [Wio Lite W600 - ATSAMD21 Cortex-M0 Wireless Development Board](https://www.seeedstudio.com/Wio-Lite-W600-p-4155.html)
          * [Wio Lite MG126 - ATSAMD21 Cortex-M0 Blue Wireless Development Board](https://www.seeedstudio.com/Wio-Lite-MG126-p-4189.html)
      * [Seeeduino LoRaWAN](https://www.seeedstudio.com/Seeeduino-LoRaWAN-p-2780.html)

* **Seeed K.K.**: http://www.seeed.co.jp/package_SeeedJP_index.json
  * **SeeedJP STM32 Boards**
      * Seeed Wio LTE Cat.1
      * Seeed Wio 3G
      * Seeed Wio LTE M1/NB1(BG96)
  * **SeeedJP ReButton**
      * Seeed ReButton

* **SiFli**: https://github.com/OpenSiFli/ArduinoCore-zephyr/releases/latest/download/package_sifli_index.json or https://downloads.sifli.com/github_assets/OpenSiFli/ArduinoCore-zephyr/releases/latest/download/package_sifli_index_cn.json (Users in China can use this link to avoid failing to install due to network factors)
  * Currently supports the SiFli SF32LB52 DevKit LCD board

* **Simba**:
  * **Simba AVR**: https://raw.githubusercontent.com/eerimoq/simba-releases/master/arduino/avr/package_simba_avr_index.json
      * Arduino Mega
      * Arduino Nano
      * Arduino Pro Micro
      * Arduino Uno
  * **Simba ESP**: https://raw.githubusercontent.com/eerimoq/simba-releases/master/arduino/esp/package_simba_esp_index.json
      * ESP-01
      * ESP-12E
  * **Simba SAM**: https://raw.githubusercontent.com/eerimoq/simba-releases/master/arduino/sam/package_simba_sam_index.json
      * Arduino Due

* **Silicon Labs (official)**: https://siliconlabs.github.io/arduino/package_arduinosilabs_index.json
  * **Github repo and instructions (Gecko Series 2)**: https://github.com/SiliconLabs/arduino
    * Arduino Nano Matter BLE Matter
    * SparkFun Thing Plus Matter MGM240P BLE Matter
    * Silicon Labs xG24 Explorer Kit BLE Matter
    * Silicon Labs xG24 Dev Kit BLE Matter
    * Silicon Labs xG27 Dev Kit BLE
    * Silicon Labs BGM220 Explorer Kit BLE

* **Sipeed**:
  * **kendryte k210 (MAIX)**: http://dl.sipeed.com/MAIX/Maixduino/package_Maixduino_k210_index.json
    * MAIX One Dock
    * MAIX Bit
    * MAIX Go
  * **K210 (MAIX) CDN**: http://dl.sipeed.com/MAIX/Maixduino/package_Maixduino_k210_dl_cdn_index.json
    * CDN mirror of K210 (MAIX)

* **SODAQ**:
  * **SODAQ AVR**: http://downloads.sodaq.net/package_sodaq_index.json
    * SODAQ Mbili
    * SODAQ Tatu
  * **SODAQ SAMD**: http://downloads.sodaq.net/package_sodaq_samd_index.json
    * SODAQ Autonomo
    * SODAQ ONE
    * SODAQ ExpLoRer

* **Sony**: https://github.com/sonydevworld/spresense-arduino-compatible/releases/download/generic/package_spresense_index.json
  * Spresense

* **SparkFun**: https://raw.githubusercontent.com/sparkfun/Arduino_Boards/master/IDE_Board_Manager/package_sparkfun_index.json
  * AVR Boards (ATmega128RFA1 Development Board, Digital Sandbox, Fio v3, MaKey MaKey, Mega Pro (Mini) 3.3V, ProMicro 3.3V & 5V, Serial 7-Segment Display)

* **STM32 core (official)**: https://github.com/stm32duino/BoardManagerFiles/raw/main/package_stmicroelectronics_index.json  
  * Provide support of the following STM32 series:
    * STM32C0
    * STM32F0, STM32F1, STM32F2, STM32F3, STM32F4, STM32F7
    * STM32G0, STM32G4
    * STM32H5, STM32H7
    * STM32L0, STM32L1, STM32L4, STM32L5, 
    * STM32MP1 (Cortex-M)
    * STM32U5
    * STM32WB, STM32WBA, STM32WL
  * List of current supported boards [here](https://github.com/stm32duino/Arduino_Core_STM32#supported-boards)

* **[archived] STM8 core (official)**: https://raw.githubusercontent.com/stm32duino/BoardManagerFiles/main/package_stmicroelectronics_index.json  
  * Provide support of the following STM8 series:
    * STM8L
    * STM8S
  * List of current supported boards [here](https://github.com/stm32duino/Arduino_Core_STM8#boards-available)

* **STM8**: https://github.com/tenbaht/sduino/raw/master/package_sduino_stm8_index.json
  * An Arduino-like programming API that can be used from within the Arduino IDE or for Makefile-controlled builds.
  * Using the SDCC and written in plain C instead of C++.
  * STM8F103 breakout board
  * ESP14 WiFi board
  * STM8S105Discovery board

* **STM32F1xx/STM32F4xx/STM32F3xx Series**: http://dan.drown.org/stm32duino/package_STM32duino_index.json
  * STM32 Discovery F407
  * STM32Stamp F405
  * Netduino2 F405
  * STM32F3Discovery
  * Maple Mini
  * Maple (Rev 3)
  * Maple (RET 6)
  * Microduino Core STM32 to FLASH
  * STM Nucleo F103RB (STLink)
  * Generic STM32F103C series
  * Generic STM32F103R series
  * Generic STM32F103T series
  * Generic STM32F103V series
  * Generic STM32F103Z series
  * Generic GD32F103C series

* **Talk²**: http://talk2arduino.wisen.com.au/master/package_talk2.wisen.com_index.json
  * [Talk² Whisper Node](https://talk2.wisen.com.au/product-talk2-whisper-node-avr/): Ultra-low power Arduino + RFM69 running on single AA battery

* **Texas Instruments MSP430, MSP432, TivaC**: https://raw.githubusercontent.com/Andy4495/TI_Platform_Cores_For_Arduino/main/json/package_energia_optimized_index.json
  * GitHub repo with more info: https://github.com/Andy4495/TI_Platform_Cores_For_Arduino
  * See also: https://github.com/ndroid/msp432-core/

* **Texas Instruments MSP432 Red Launchpad boards from TI** (alternative to above): https://github.com/ndroid/msp432-core/raw/main/package_msp432_index.json
  * GitHub Project: https://github.com/ndroid/msp432-core
    * Adapted from Energia cores
    * Extended features and libraries (added support for MSP432P4111)
  * MSP432P4xx Boards:
    * Texas Instrument MSP432P401R Red Launchpad
    * Texas Instrument MSP432P4111 Red Launchpad

* **TKJ Electronics**: https://raw.githubusercontent.com/TKJElectronics/Balanduino/master/package_tkj_balanduino_index.json
  * Balanduino

* **TL7788 Kit**: https://rawgit.com/hunianhang/nufront_arduino_json/master/package_tl7788_index.json
  * TL7788 Kit v1.0.3

* **Tuya Open**: https://github.com/tuya/arduino-tuyaopen/releases/download/global/package_tuya_open_index.json
  * T2
  * T3

* **UDOO**: https://udooboard.github.io/arduino-board-package/package_udoo_index.json
  * UDOO Quad/Dual
  * UDOO Neo

* **Windows 10 IoT Core**: https://github.com/ms-iot/iot-utilities/raw/master/IotCoreAppDeployment/ArduinoIde/package_iotcore_ide-1.6.6_index.json
  * [Windows 10 IoT Core](http://www.windowsondevices.com/)
    * Raspberry Pi 2 & 3
    * Minnowboard MAX

* **wirino**: https://per1234.github.io/wirino/package_per1234_wirino_index.json
  * GitHub repository: https://github.com/per1234/wirino
  * Boards:
    * Wiring S
    * Wiring S with Play Shield
    * Wiring V1.0
    * Wiring Mini V1.0
    * Wiring V1.1 ATmega1281
    * Wiring V1.1 ATmega2561
  * Dependencies:
    * MightyCore: https://mcudude.github.io/MightyCore/package_MCUdude_MightyCore_index.json
    * MegaCore: https://mcudude.github.io/MegaCore/package_MCUdude_MegaCore_index.json

* **XMegaForArduino project**: https://github.com/XMegaForArduino/IDE/raw/master/package_XMegaForArduino_index.json
  * Github project:  http://github.com/XMegaForArduino
  * Support for several XMEGA processors (some may require compiler patches), more to come
  * Basic 'pins_arduino.h' files for 'standard' layouts, described in the file
  * Intended to be the basis for your own custom XMEGA-based board
  * Supports dedicated pins for hardware serial flow control
  * Implements a low-current 'wait' state for delay and wait for interrupt
  * bootloaders for 'arduino' and 'wiring' protocol.
  * USB support 'under development' (for ATxmega128A1U, others)
  * Provides new libraries for SPI, SD, 2-wire so you can start using these right away
  * Includes patch files for compilers and tools (source patch), and instructions on how to modify earlier IDE versions
  * Leverages XMEGA's internal 32 MHz clock in the startup code (no external crystal or resonator required)
  * Advanced interrupt handling support (basically ANY pin can be an interrupt).
  * Advanced pin settings include pull up, pull down, on both input and output
  * Project is still in a 'beta' state, but is fully functional for nearly all practical uses, and as 'Arduino compatible' as could be made possible.

* **XMiniCore**: https://felias-fogg.github.io/XMiniCore/package_felias-fogg_XMiniCore_index.json
  * ATmega328P Xplained Mini
  * ATmega168BP Xplained Mini
  * ATmega328PB Xplained Mini
  * This is basically a [debug-enabled stripped-down version](https://github.com/felias-fogg/XMiniCore) of [MiniCore](https://github.com/MCUdude/MiniCore) to cater to needs of the Xplained Mini boards. It can also be viewed as a replacement of the [Atmel AVR Xplained-minis core](https://github.com/AtmelUniversityFrance/atmel-avr-xmini-boardmanagermodule) contained in the Arduino distribution.

* **HelTec CubeCell**: https://github.com/HelTecAutomation/CubeCell-Arduino/releases/latest/download/package_CubeCell_index.json
  * Github project:  https://github.com/HelTecAutomation/CubeCell-Arduino
  * Based on an ultra low power design, attains 3.5uA in deep sleep mode, even with the RTC clock running;
  * LoRa signal output put power range 0~22(±1) dBm;
  * Low-cost despite its current state of the art technology;
  * Integrated encryption algorithm protects your investment by rendering cloned firmware inoperative;
  * Based on proven technology - the new ASR650x, is a combination of the PSoC4000 and SX1262 into a single chip, reducing the overall size to something smaller than the competition;
  * Solar panel support;
  * LoRaWAN protocol support;
  * AT command support;
  * In the LoRaWAN relevant examples, have a reasonable timeline planning.

* **HelTec Wifi Kit 32**: https://github.com/Heltec-Aaron-Lee/WiFi_Kit_series/releases/download/0.0.5/package_heltec_esp32_index.json

* **Z-Wave.Me Z-Uno**:
  * Arduino-like board with the full support of Z-Wave protocol including Z-Wave Plus and Z-Wave Long Range
  * Supports always-on, sleeping, and frequently sleeping (FLiRS) modes
  * [Z-Uno project](https://z-uno.z-wave.me/technical/) page
  * **Z-Uno 2 (7th gen Z-Wave boards)**: https://z-uno.z-wave.me/files/z-uno2/package_z-wave2.me_index.json
    * [GitHub project](https://github.com/Z-Wave-Me/Z-Uno-G2-Core) repository
    * [Projects and examples](https://z-uno.z-wave.me/examples/?zunoVersion=v2)
  * **Z-Uno 1 (5th gen Z-Wave boards)**: https://z-uno.z-wave.me/files/z-uno/package_z-wave.me_index.json
    * [GitHub project](https://github.com/Z-Wave-Me/Z-Uno-Core) repository
    * [Projects and examples](https://z-uno.z-wave.me/examples/?zunoVersion=v1)

* **W80x_arduino**: https://github.com/board707/w80x_arduino/blob/hal-v0.6.0/package_w80x_index.json
  * Arduino package for WinnerMicro boards, based on XT-E804 MCU.
  * GitHub repository: https://github.com/board707/w80x_arduino
  * Boards:
    * W801
    * W806
    * Air103

* **WinChipHead/WCH**: https://github.com/openwch/board_manager_files/raw/main/package_ch32v_index.json
  * GitHub page: https://github.com/openwch/arduino_core_ch32
  * Boards (CH32V series):
    * CH32V00x EVT Boards
    * CH32V20x EVT Boards
    * CH32X035 EVT Boards
    * CH32V10x EVT Boards
    * CH32V30x EVT Boards