Emesene!

Empathy is a messaging program which supports text, voice, video chat, and file transfers over many different protocols. You can tell it about your accounts on all those services and do all your chatting within one application.

Chat everywhere! IM+ is the most widely used mobile IM app! Connect all-in-one to MSN, Yahoo!, Google Talk, AIM, Jabber, ICQ, Facebook, MySpace and Twitter on ALL popular mobile platforms.

A simple & beautiful app for Facebook Messenger.Chat without distractions on any Operating System.

An IRC client for the Windows desktop which follows the Metro design guidelines.

The Swift project was founded by Remko Tronçon and Kevin Smith, both co-authors of XMPP: The Definitive Guide and long-time members of the XMPP community, in an effort to create a better messaging client for users who want or need to access servers running with the standard XMPP protocols and who want a client that’s easy to use, responsive and unobtrusive. Since then the Swift ecosystem of software has grown to include XMPP libraries for multiple languages/platforms and assorted smaller XMPP tools. »

aMSN is a free open source MSN Messenger clone.aMSN attempts to emulate the look and feel of Windows Live Messenger, and supports many of its features.

Jabber client for Android.

Palringo is the lightweight Instant Messaging client for desktop computers. Express yourself in chat with emoticons and smileys to show your friends how you’re feeling. Send voice messages at the click of a button so your friends can hear your voice. Show your buddies what you’re looking at by sharing photos and pictures in chats. See where your friends are right now with location and let everyone know where you are. Create groups so you can send messages to everyone at the same time. Or search the existing groups to find chat rooms you’re interested in and meet new people. »

Galaxium is an instant messenger application designed for the GNOME desktop. It will allow you to connect to MSN, Jabber, and IRC. You can communicate with your family, friends and co-workers from around the world, using different networks at the same time, while still keeping the unique user experience of each networks features.

Centericq is a text mode menu- and window-driven IM interface that supports the ICQ2000, Yahoo!, AIM, IRC, MSN, Gadu-Gadu and Jabber protocols.