The MUSCLE system is a fast, portable, flexible client-server system for distributed applications. Clients send BMessage-like PortableMessages to each other either directly or via a centralized server (with built-in database and 'live query' support).
Elastic Management of Tasks in Virtualized Environments is in charge of managing virtual machines created in Xen by creating full customized virtual machines and allowing executing tasks inside this.
WS Arena is a XMPP platform that allows applications to multiplex streaming messages of any content type. Messaging can be accomplished asynchronously across networks in real time. Possible transport modes include WS-to-WS, WS-to-XMPP, and XMPP-to-XMPP.
A distributed, peer-to-peer, server-less communication & messaging solution for JAVA (JMS), C++ and .NET applications, integrates with JBoss, WebLogic & WebSphere. Offers guaranteed delivery, security and transactions. Supports TCP, SSL & HTTP protocols.
nemosomen is a framework for designing open source, network based, multimedia (video/openGL/sound/MIDI) realtime toys
a suite of tools for distributed development, processing of media. It tries to shift most of the working process in realtime processes.
Profile Pal will help you synchronize your profiles amongst different communities like ICQ, Microsoft Live, Facebook, etc. It is plugin based and meant to be accessed as servlet on tomcat. Use this to keep all your pfoiles in sync.