PlanetaMessenger.org is an open source universal Instant Messenger (IM) developed fully in Java. PlanetaMessenger.org has plug-in based support for the different IM networks. Among the supported networks are ICQ, AIM, MSN and Jabber - and it even support multiple profiles for these networks.
Some PlanetaMessenger.org features are:
-Plugin support for many IM networks like, ICQ, AIM, MSN, ComVC, Yahoo, Jabber and so on. -Multi-profile support.
-Support to internationalization. -Skins, and much more