New version is released at a Sourceforge project openmim.
See http://sf.net/projects/openmim .
Openmim supports ICQ and MSN. Has asynchronous operations (see openmim-1.0 release notes for more details).
The jcq2k project is currently the definitive public source of the TCP-based ICQ2000 OSCAR protocol documentation. Status: working pre-alpha.
Features currently implemented: logging in and out of the ICQ server, sending/receiving of the text, contacts, and status messages, receiving of the url messages, and receiving of user details. Receiving of offline messages still doesn't work at the moment: still needs to be hacked.... read more