Apache Solr

Solr is an open source enterprise search server based on the Lucene Java search library, with XML/HTTP and JSON, Ruby, and Python APIs, hit highlighting, faceted search, caching, replication, and a web administration interface.

Apache Shiro

Apache Shiro is a powerful and easy-to-use Java security framework that performs authentication, authorization, cryptography, and session management.

OpenCCM

OpenCCM stands for the Open CORBA Component Model Platform: The first public available and open source implementation of the CORBA Component Model (CCM) specification defined by theObject Management Group (OMG).

The CORBA Component Model (CCM) is the first vendor neutral open standard for Distributed Component Computing supporting various programming languages, operating systems, networks, CORBA products and vendors seamlessly. The CCM is an OMG's specification for creating distributed, server-side scalable, component-based, language-neutral, transactional, multi-users and secure applications. Morever, one CCM application could be deployed and run on several distributed nodes simultaneously.

Then OpenCCM allows you to design, implement, compile, package, assemble, deploy, install, instantiate, configure, execute, and manage distributed CORBA component-based applications

Platform: Linux;License: LGPL

Reference: https://openccm.ow2.org/

ProActive

ProActive Parallel Suite is an innovative Open Source solution for parallel, distributed, multi-core computing.

ProActive features Java Parallel Programming seamlessly integrated with Scheduling and Resource Management. ProActive simplifies the  programming and execution of parallel applications on Linux, Windows and Mac, together with the management of resources such as Desktop, Servers, Clusters, Enterprise GRIDs and Clouds.

Platform: Linux, Windows, Mac OS X;License: LGPL

Reference: https://proactive.inria.fr/

ARMADA: A Real-time Middleware Architecture for Distributed Applications

The goal of this research project is to develop and demonstrate an environment - an integrated set of techniques and software tools - for designing, implementing, modifying, and integrating real-time distributed services that are necessary to realize computation, I/O, or communication intensive embedded real-time applications on parallel and/or distributed platforms.

regain

regain is a fast search engine on top of Jakarta-Lucene. It crawles through files or webpages using a plugin architecture of preparators for several file formats and data sources. Search requests are handled via browser based user interface using Java server pages. ´regain´ is released under LGPL and comes in two versions: 1. standalone desktop search program including crawler and http-server 2. server based installation providing full text searching functionality for a website or intranet fileserver using XML configuration files.

Platform： Windows, Linux;License: LGPL

Reference: https://regain.sourceforge.net/

YaCy

This is a distributed web crawler and also a caching HTTP proxy. You are using the online-interface of the application. You can use this interface to configure your personal settings, proxy settings, access control and crawling properties. You can also use this interface to start crawls, send messages to other peers and monitor your index, cache status and crawling processes. Most important, you can use the search page to search either your own or the global index.

Platform：Windows, Linux, Mac OS ;License: GNU GPL

Reference: https://regain.sourceforge.net/