InstantBird is a multi-protocol instant messenger client that allows us to connect at the same time with different messenger services like MSN, Netsoul, AOL, Gadu-Gadu, IRC, MySpace IM, Google Talk, ICQ or Yahoo IM. This is very interesting when you want to manage your contacts from different networks from the same application.
As an additional advantage this application allows the installation of complements to increase its functionality. What's more, it is free, so you can use it whenever you want, and open source, so any user with programming knowledge can make their own adaptations and improvements. In respect to its user interface, it it very similar to Pidgin.