Emesene 1.5 brings a lot of new features and bugfixes, most notable being the webcam (video) support. Changes in 1.5:

* Compatible with the latest Window Live Messenger(tm)
* New plugin set (Plus! colors, Notifications, Mail check, etc.)
* HTTP connection and proxy support
* @msn accounts support

Gyachi is a Yahoo! client for Linux operating system that supports almost all of the features you would expect to find on the official Windows Yahoo! client: Voice chat, webcams, faders, 'nicknames', audibles, avatars, display images, and more.

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

One of the frustrating things about IM networks is that you can’t really choose what networks your friends use and you can end up stuck with whatever they are using. Aside from not talking to your friends on IM, there’s not a lot you can do other than grudgingly get an account on said service and bite the bullet.

Here you got the new release of pidgin, this multi messenger client. Enjoy ;)