KMess - Open Source Messenger for Linux

KMess (current version: 1.5-pre2) is an open source chat client for Linux which allows you to chat with your friends who are using MSN Messenger. It focuses on the specific features of MSN.

Some of the main features of KMess are:

• Support for group chats with multiple contacts.
• Picture and file transfers.
• Emoticons and text formatting are supported.
• Chat logging.

You can read more about its features here and download it here.