Google Talk 
They say talk is cheap. Google thinks it should be free. Google Talk enables you to call or send instant messages to your friends for free anytime, anywhere in the world. Google Talk offers you:
Choice: Get in touch how and when you want to...
Shareware from Google | 8/24/2005
ADDED
12/19/2006
UPDATED | 1
DAY
0
WEEK | 
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MSN Messenger: Plus Extension
The Plus Extension is designed to enhance MSN Messenger by adding several new capabilities to its interface....
Freeware from Patchou | 5/13/2003
ADDED
1/21/2005
UPDATED | 0
DAY
0
WEEK |
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MSN Messenger
Chat online, in real time, with friends, family, and colleagues. It's faster than e-mail, more discreet than a phone call, and best of all – it's free!
Freeware from Microsoft Corp. | 11/23/2006
ADDED
11/23/2006
UPDATED | 0
DAY
3
WEEK |
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dMSN Messenger
Java based chat program that connects to ICQ and MSN.
It's just like your normal MSN Messenger only with more functions and it shows you more usefull information like when someone has removed you from his or her list.
Freeware from Danny | 11/28/2006
ADDED
11/28/2006
UPDATED | 0
DAY
0
WEEK |
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Y!Tunnel
Y!TunnelPro is the premier Yahoo! Messenger companion. This easy-to-use program provides additional features to Yahoo! Messenger including enhanced privacy, better connections to voice servers, endless ignore bin, font and style filtering, and spa...
Shareware from Chet Simpson | 3/18/2005
ADDED
4/8/2006
UPDATED | 0
DAY
14
WEEK |
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R E L A T E D S O
F T W A R E 
Network and Internet