open source jabber webclient mit openid unterstützung, teils java-basierend
psyced, a scalable multi-protocol multi-casting chat, messaging and social server solution to build decentralized chat networks upon, released as open source.
real time social browsing - With the SamePlace extension for Firefox, you can enter a virtual place associated with each web page you visit, and meet others who did the same. realised with jabber