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Psi+ is a cross-platform powerful Jabber client (Qt, C++) designed for the Jabber power users.
Nounours is a Javascript Web client to Jabber protocol. It's using BOSH implementation to communicate with a jabber server.
TrophyIM is a Jabber (XMPP) client built on top of strophe
An ajax web jabber client
psyced, a scalable multi-protocol multi-casting chat, messaging and social server solution to build decentralized chat networks upon, released as open source.
Tips und Tricks rund um den jabberd
Idavoll is an implementation of a generic publish-subscribe service component for Jabber servers, as described in JEP-0060
JSJaC is a jabber client library written in JavaScript to ease implementation of web based jabber clients.
open source jabber webclient mit openid unterstützung, teils java-basierend