free mobile chat IM and conference Java-based J2ME with MIDP-2.0
SubliMobi With Sublimobi, Meet with new people, Keep in touch with your friends, Chat and Share pictures from your mobile.
Works with MSN, Hotmail, GMail, Facebook, Yahoo, MySpace, Orkut, Friendster etc
wechats Guide Get started with WeChat! Here is a full guide on how to use this instant Messenger
IMPlus Chat across IM+® All-in-One Mobile Messenger within MSN®/ Windows Live™ Messenger, Yahoo!®, AIM®/iChat™, ICQ®, Jabber® and Google Talk™ messengers between mobile devices and PCs in real-time