TwInbox seamlessly integrates Twitter into Outlook. It is a perfect Twitter client for any Outlook user, from a Twitter newbie to a business professional, and it is at your fingertips without having to open any other applications.

Features:

Update your Twitter status directly from Outlook

Receive your friend updates in Outlook

Archive, manage, group and search your tweets the
same way you manage your email

Search, track keywords. TwInbox will automatically download ALL tweets matching the keywords you specify, even if you are not following the tweet sender. This feature is perfect for keeping up to date with the Twitter buzz on your name, brand, interests, etc

Group tweets by sender, topic, etc using the Search feature

Manage multiple Twitter accounts

Upload and post picture files and Outlook email attachments

See new tweets at a glance

Assign custom folder and categories to new messages

Use "Reply" and "ReplyAll" commands to send twitter direct messages and @replies

Automatically sort new tweets into per-sender folders

Shorten URLs with bit.ly

See graphs of your Twitter usage statistics

Tweets sent to you (@replies and direct) are marked with high importance, so you can see them at a glance

TwInbox does NOT work with Outlook Express.