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AdiIRC is an IRC client with multi-server support and a customizable interface.

Most likely the most comprehensive, powerful and feature-rich instant messaging solution one can find

Skype for Windows is an efficient application that helps you communicate all over the world.

Jfbchat is a small, simple and powerful application specially designed to offer you a Facebook chat client.

WinSent Messenger is a program intended for instant messaging within local area networks (LAN).

Yahoo! Messenger - much more than just an instant messenger

A chat program that allows you to connect to different networks like MSN, Gtalk, Facebook chat, Jabber and others.

ClicksAndWhistles is a popular and free IRC client for Windows users.

Mumble is an open source, low-latency, high quality voice chat software primarily intended for use while gaming.

Messenger for Windows is a new, trial application that lets you use Facebook without being on www.facebook.com.

A free instant messenger that allows you to chat with all your Facebook contacts

YMulti Messenger lets you open as many instances of YM on your pc.

SkyHistory is now a Skype application to save and manage your Skype chat history and call logs

dTIE enables you to send texts or images over the network.