Clients
http://www.aim.com/
AIM, AOL Instant Messenger, is a free instant messaging service. Download
AIM and learn about AIM options, including AIM games and international AIM,
at AIM.com.
http://www.icq.com/
Welcome to ICQ, the largest multi lingual community on the Web! Download
ICQ, meet new friends, find old pals and get together with people around
the world!
http://www.jabber.org/
The Jabber Software Foundation (JSF) is a not-for-profit membership organization.
The Organization oversees the general development of XMPP protocol and maintains
Jabber Enhancement Proposals.
http://messenger.yahoo.com/
With Yahoo! Messenger you can chat online and send instant messages for
free while enjoying many fun features like Internet calls, photo sharing,
file sharing, customized avatars and buddy icons, online music, stealth
settings, and online games.
http://www.skype.com/
Skype is a little piece of software that allows you to make calls from your
computer. Talk for as long as you like without worrying about the cost or
the distance.