Windows Communication
Very popular chat client abroad
Voice communication system in groups
Messaging client with support for ICQ, Yahoo, Jabber, etc
Make free video calls to mobile phones
Talk to your contacts about Skype, Facebook, GMail at the same time
Send SMS from your computer
Manage your work with GTD in Outlook
Alerts you if you have new emails from the taskbar
Very useful email server
Download attachments from your emails or mails