Windows Live™ Messenger is the next-generation MSN Messenger. It has everything you already love about Messenger—your contact list, emoticons, and instant access to your friends via text, voice, and video—plus new ways to connect and share documents with almost magical ease. As always, it is free to download Messenger and use most of its features.

Features
Send all your familiar winks and emoticons, plus some cool new ones
Have real-time text, video and voice conversations*
Call your friends’ mobile or land-line telephones by signing up with Verizon to make affordable domestic and international calls
Easily share documents of all kinds with Sharing Folders
Make free PC-to-PC calls with other Messenger users - Both parties must have compatible Web cams, microphones, and speakers.