Agora Web Messenger is an open-source client for the jabber protocol. It aims at provide a user-friendly interface for this wonderful protocol.
Simple, but powerfull Jabber communicator written in C#
It is an instant messaging client. Crony IM has support for some commonly used instant messaging protocols, allowing the user to log into various different services from one application. like LAN, GTalk, Yahoo, Facebook.
This a new instant messenger for unix.