Moggl is a social network for meeting people, with all the regular social network features, and ajax chat, it has a unique feature, you can manage your network via your instant messenger. Registration is possible by instant messenger, robot@moggl.com.

Pidgin is a multi-protocol Instant Messaging client that allows you to use all of your IM accounts at once (formely Gaim).

An IRC to other chat networks gateway

IM2 Instant Messenger

tabbed messaging in Miranda