Xobni: Inbox spelled backwards. With Xobni for Outlook you find out more about your contacts. When you get a new email, if that person is a member of Facebook, Skype, LinkedIn, or others you will know right away!
Not only that, it indexes your email so you can search email and people faster than you can type. It threads emails so your conversations are in context, and more! And best of all, it’s free!