Windows Live Messenger is one of the most popular instant messenger that includes support for the im Initiative. With Windows Live Messenger, you can call your friends’ PC for free, mobile or landline phones. The only requirement for calling is a a microphone and speakers or a headset and broadband connection. You can also start a video conversation with a webcam. Windows Live Messenger also offers photo sharing and other stuff for your friends and colleagues in a Sharing Folder, and as many as you want. Windows Live Messenger also support Yahoo! IM contacts, so you can contact your Yahoo! IM contact from Windows Live Messenger. Download Windows Live Messenger for free now.