Windows Live Messenger is a Social & Communication software developed by Microsoft Corporation. After our trial and test, the software is proved to be official, secure and free. Here is the official description for Windows Live Messenger:

Windows Live Messenger 8.0 (MSN8.0) 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 photos and documents effortlessly. As always, it's free to download Messenger and use most of its features.