iJab is an Ajax-based web based instant messaging program for XMPP/Jabber. It is free software
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
Dt. Microblogging Dienst: SMS, IM/Jabber, RSS, Webinterface
open source jabber webclient mit openid unterstützung, teils java-basierend
web interface für instant messaging