Pidgin

KVIrc is a free portable IRC client based on the excellent Qt GUI toolkit. KVirc is being written by Szymon Stefanek and the KVIrc Development Team with the contribution of …

Konversation is an easy-to-use IRC client for novices, nut novices and experts can take advantage of its rich featureset.

Psi+ is a development branch of Psi IM XMPP/Jabber client. Psi is a cross-platform powerful XMPP/Jabber client (Qt, C++) designed for the Jabber power users.

TorChat is a peer to peer instant messenger with a completely decentralized design, built on top of Tor's location hidden services, giving you extremely strong anonymity while being very easy …

WeeChat is a fast, light and extensible chat client. It runs on many platforms (including Linux, BSD and Mac OS). WeeChat is: - modular: a lightweight core with plugins around …

Spark is an Open Source, cross-platform IM client optimized for businesses and organizations. It features built-in support for group chat, telephony integration, and strong security. It also offers a great...

Tencent QQ, generally referred to as QQ, is the most popular free instant messaging computer program in Mainland China, and has over 856.2 million users. In April 2010, QQ.com ranked …

KMess is the Live Messenger alternative for Linux, aiming at integration with the KDE desktop environment. With KMess, chatting with friends using Live Messenger has never been so good. Features: …

GyachE Improved (GyachI) is a fork from Gyach Enhanced Yahoo! client for Linux operating systems. This Yahoo! client supports almost all of the features you would expect to find on …

Nettalk is a powerful but easy to use free (open source) IRC-client for Windows. The smart user interface is based on Windows standards, so it is easy to get used …

IceChat is a fully featured, simple to use IRC Client allowing you to chat online with your friends and for meeting new people as well. It can be used in …

Meebo for the Desktop. It uses Adobe® AIR™ to place meebo home page on the desktop in its own window.

Tkabber is a Free and Open Source client for the Jabber instant messaging system. Its writen in Tcl/Tk, and works on many platforms (tested on Linux, FreeBSD, NetBSD, Solaris, MacOS …

Zoho Chat is a web based chat system. You can access it using just a web browser and an internet connection. It does not need any software to be downloaded …

A beautiful, free, easy-to-use chat (instant messaging) application for the XMPP protocol (Jabber, Google Talk). Project has been discontinued, though source code is still available on website

FlowChat is an advanced IRC client for the iPhone operating system. Features include photo uploading, embedded web browser, custom themes, auto-complete while typing nicknames/commands, management of channel...

Lingo is an IRC chat client designed with simplicity in mind that is ideal for both novice and expert users. It supports multi-server connections, notifications, auto completion, SSL encryption, UTF-8 …

Tinychat is easy and free video chat rooms for all. Browse through the free video chat rooms to meet friends or make your own chat room. No downloads, no signup, …

FBMessenger is a stand-alone Facebook Messenger app for Linux, very similar to the official Messenger for Windows. It was created by Jack O'Connor, a Facebook Developer.

ShMessenger Mobile is a free instant messaging client for mobile phones, which supports YMSG (Yahoo!), MSN and GTalk protocols. In just a few minutes, you can chat with your friends …

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

Meow is a new way to chat and explore the world instantly!

Subway is a web-based IRC client with a multi-user backend and a JavaScript-heavy UI. Frontend/backend communication is done with websockets (or best available fallback where not available). The backend...

Mercury Messenger or simply "MM" (formerly called dMSN) is a Windows Live Messenger network Instant Messaging client developed in Java. It supports almost all of the features in Windows Live …

Connect with your friends on one simple platform. Use ISIM to combine all of your contacts from Skype, Google+ and Facebook. Staying in touch has never been this easy.