aMSN is a MSN Messenger clone, with features such as:

* Offline Messaging
* Voice Clips
* Display pictures
* Custom emoticons
* Multi-language support (around 40 languages currently supported)
* Webcam support
* Sign in to more than one account at once
* Full-speed File transfers
* Group support
* Normal, and animated emoticons with sounds
* Chat logs
* Timestamping
* Event alarms
* Conferencing support
* Tabbed chat windows

For a full list, see the official site below. More features can be added to aMSN with plugins , or completely change its look with different skins!

Similar applications: 
MSN Messenger, Windows Live Messenger