Skype is a leading instant messaging application that lets you chat, share content and even make free phone calls over the Internet.
License:
OS Support: WinXP, Win2000, Win Vista, Win98

Windows Live Messenger 2011 is the latest version of the popular Messenger series.
License:
OS Support: WinXP, Win2000, Win Vista, Win98, Win95

aMSN, the more interesting alternative to Windows Live Messenger you can find.
License:
OS Support: WinXP, Win2000, Win Vista

Microsoft presents the latest version of Messenger, Windows Live Messenger; a powerful instant messages client.
License:
OS Support: Win Vista

Yahoo Multi Messenger is designed using the most advanced technology for instant messaging systems.
License:
OS Support: WinXP, Win2000, Win Vista

MSN Messenger is the most popular instant messages client in the world Homes and big companies alike have it in their computers, so you must have it in yours.
License:
OS Support: WinXP, WinME, Win2003, Win2000, Win Vista, Win98

This program counts on a great number of features, such as “polygamy”, with which you will be able to open more than one account at the same time.
License:
OS Support: WinXP, Win2003, Win2000, Win Vista

SweetIM is an amazing emoticons pack to give a funny touch to your chat conversations in Windows Live Messenger or Yahoo! Messenger.
License:
OS Support: WinXP, Win2003, Win2000, Win Vista

AV Voice Changer Software Diamond is an amazing application that will allow you to change the tone of voice of the person who speaks in the microphone of the PC.
License:
OS Support: WinXP, Win2003, Win2000, Win Vista, Win98

Camfrog Video Chat offers a lovely interface which has a very comfortable structure The main window will contain all the contacts you add as time goes by.
License:
OS Support: WinXP, Win2003, Win2000, Win Vista