AMSN Messenger

aMSN Messenger is an opensource MSN Messenger clone.

It offers all the functions of MSN Messenger and more. This chat client has build in tabs and automatically saves your chatlogs. You can download many skins and plug-ins on the official website.

aMSN Messenger is available for Windows, Linux, FreeBSD and Mac OS X. This download is for Windows only.

A good alternative for aMSN Messenger is Windows Live / MSN Messenger.