Lead Mod Designers (in chronological order):
Rhye
Arkaeyn
spaceman98
EdmundIronside
bluepotato

Other contributors:
Autumn Leaf, redaloe

Mods included:
platyping's worldbuilder
Unofficial Patch
Sanguo Mod Performance
Sevopedia
GameFont Display

Libraries included:
simplejson
OrderedDict backport

Mods from which graphics and/or code was borrowed:
LOTR mod: https://forums.civfanatics.com/threads/middle-earth-mod.519782/
Dawn of Civilization: https://forums.civfanatics.com/forums/rhyes-and-fall-dawn-of-civilization.452/
Sword of Islam: https://forums.civfanatics.com/threads/the-sword-of-islam-rfc-medieval-middle-east.373155/
Caveman 2 Cosmos: https://forums.civfanatics.com/threads/caveman-2-cosmos.288570/
Quot Capita: Majesty: https://forums.civfanatics.com/threads/quot-capita-majesty.498840/
History Rewritten: https://forums.civfanatics.com/forums/mac-win-civ4-history-rewritten.448/
Rhye's & Fall Classical World: https://forums.civfanatics.com/forums/rfc-mod-mod-classical-world.484/
PIE's Ancient Europe: https://forums.civfanatics.com/threads/pies-ancient-europe.352646/
Just Another Religion Mod: https://forums.civfanatics.com/resources/just-another-religion-mod-bts-modular-v-1-2.10354/
Realism Invictus: https://forums.civfanatics.com/threads/realism-invictus.411799/

Specific code credits:
Automatic HidePythonExceptions disabler by Nightinggale

Civilizations
The Minoan civilization was borrowed from Civ Gold mod, credit goes to the civs original creator.
The Mycenae civilization was created by cybrxkhan
The Assyrian civilization was borrowed from Civ Gold mod, credit goes to the civs original creator.
The Scythian civilization was borrowed from Civ Gold mod, credit goes to the civs original creator.
The Sassanid civilization was created by cybrxkhan
The Numidian civilization was borrowed from History Rewritten mod, credit goes to Xyth.

Leaderheads
http://forums.civfanatics.com/resources/lh-urukagina.13711/ (IgorS)
http://forums.civfanatics.com/showthread.php?p=5965710 (esnaz)
http://forums.civfanatics.com/showthread.php?t=277514 (ekmek)
http://forums.civfanatics.com/downloads.php?do=file&id=7636 (C.Roland)
http://forums.civfanatics.com/resources/lh-dido-v1.13841/ (The Capo)
http://forums.civfanatics.com/showthread.php?p=6179859 (esnaz)
http://forums.civfanatics.com/showthread.php?t=152663 (CivArmy s. 1994)
http://forums.civfanatics.com/showthread.php?t=356411 (kochman)
http://forums.civfanatics.com/downloads.php?do=file&id=13838 (The Capo)
http://forums.civfanatics.com/showthread.php?t=209262 (Aranor)
http://forums.civfanatics.com/threads/lh-king-hiram-of-tyre-phoenicia.265234/ (Amra)
http://forums.civfanatics.com/resources/lh-king-david.10317/ (ekmek)
Kindattu by Novator (originally called Elamite Leader, found in HR)
Some Leaderhead greeting texts from CIV Gold

Sound
Background music mostly from Rhye's and Fall of the Classical World (srpt)
EpicofGilgamesh from History Rewritten (IanMusic)
Walking in depreston promo shorter by Ali Yamamoto (official free to download & use for non commercial use, with credit given to author)
Building Sounds from Sword of Islam (emrbyodead)
Hunnic, Spartan, Minoan and Phoenician diplomusic from cybrxkhan: https://forums.civfanatics.com/threads/cybrxkhans-diplomacy-music-thread.335199/
Assyrian, Nubian diplomusic from History Rewritten (IanMusic): https://forums.civfanatics.com/forums/mac-win-civ4-history-rewritten.448/

Units
Most units used were created by ambrox62

https://forums.civfanatics.com/threads/elamite-horned-warrior.486939/ (Spillsandstains)

Buildings
https://forums.civfanatics.com/resources/knossos-labyrinth.18253/ (platyping)
https://forums.civfanatics.com/resources/naqshi-i-rustam.18314/ (stolenrays)
https://forums.civfanatics.com/resources/library-in-mosul.22922/ (hrochland)
https://forums.civfanatics.com/resources/the-great-bath-of-mohenjo-daro-wonder-xml-python.11091/ (tsentom1)

Wonder Movies (for those wonders that didn't come with one)
Naqsh-e-Rustam by Zeta Nexus (music: Sight of Wonders - Arabian Nights)
https://forums.civfanatics.com/resources/wondermovie-library-of-ashurbanipal.19288/ (Arian)
Olympic Games from Pie's Ancient Europe

Text
Many Civilopedia texts from Wikipedia

If there is anyone whose work was included but not credited, please message me or post on the forums