Pidgin

Gaim - 13.66M (Open Source)
Pidgin (previously called Gaim) is a multi-protocol instant messaging (IM) client for Linux, BSD, MacOS X, and Windows. It is compatible with AIM and ICQ

Publisher's description

Pidgin (previously called Gaim) is a multi-protocol instant messaging (IM) client for Linux, BSD, MacOS X, and Windows. It is compatible with AIM and ICQ (Oscar protocol), MSN Messenger, Yahoo!, IRC, Jabber, Gadu-Gadu, SILC, GroupWise Messenger, and Zephyr networks.
Pidgin users can log in to multiple accounts on multiple IM networks simultaneously. This means that you can be chatting with friends on AOL Instant Messenger, talking to a friend on Yahoo Messenger, and sitting in an IRC channel all at the same time.
Pidgin supports many features of the various networks, such as file transfer, away messages, typing notification, and MSN window closing notification. It also goes beyond that and provides many unique features. A few popular features are Buddy Pounces, which give the ability to notify you, send a message, play a sound, or run a program when a specific buddy goes away, signs online, or returns from idle; and plugins, consisting of text replacement, a buddy ticker, extended message notification, iconify on away, spell checking, tabbed conversations, and more.
Screenshots


Technical

File Size: 13.66M
License: Open Source
Released: Jun 21, 2009
OS Support: Windows (All Versions)
Plugins: None
Publisher: Gaim
MD5 Checksum: 80e4c883eaa8b76b0ec1cf66052e66c6<
Other log

* Yahoo Protocol 16 support, including new HTTPS login method; this should fix a number of login problems that have recently cropped up. (Sulabh Mahajan, Mike "Maiku" Ruprecht)
* Only display the AIM "Unable to Retrieve Buddy List" message once per connection. (Rob Taft)
* Blocking MSN users not on your buddy list no longer disconnects you.
* When performing operations on MSN, assume users are on the MSN/Passport network if we don't get network ID's for them.