Open Source Software for Mobile Phones

JimmyIM is an open-source mobile IM client that supports simultaneous connections to multiple networks & protocols. So far, three protocols have been implemented: MSN, Jabber/Google talk and ICQ. The next step will be Yahoo protocol implementation.

Jimm is an ICQ clone for mobile devices, such as celluluar phones. It is written in Java 2 Micro Edition (MIDP) and uses protocol version 8. Jimm is not affiliated with or endorsed by ICQ, Inc.

GTMobile is a client of Google Talk that run on java phones. It requires CLDC 1.1 and MIDP 2.0 support.