Tuxitty is a msn messenger client. It supports text chating and file transferring. It's small, green and consumes only a little memory. You may sign in multiple accounts in one window.
It's developed using c++&wxWidgets. Theoretically supporting multiple platform is possible. However I have only tried windows xp. Please contact zhzh23 at gmail.com for any bugs or advices.

The license of this software is Free, you can free download and free use this instant messenger software.