Xobni is a sidebar application for Microsoft Outlook that can show recent tweets for people that email you. Simply click on an email in Outlook and the sidebar updates to show you a list of possible Twitter IDs for that person. Once you choose their ID, you can view, retweet, and reply to their tweets. You can also tweet from within the Xobni sidebar at any time.
Great simple way to connects with your Outlook contacts with Twitter.
Pros & Cons
|Very simple interface||Makes OutLook slow sometimes|
|Has other features like Facebook and LinkedIn connections|
|Auto detection for your contacts accounts in Twitter and Facebook|