OutTwit - Integrate Twitter into Microsoft Outlook

Just came across this cool app, OutTwit, by TechHit. You can update your Twitter status, receive friend's updates, send direct messages, as well as track keywords across the Twitterverse right from Outlook. The application looks to be update often.

TwitterFeed - Post Your Blog To Twitter

TwitterFeed is another utility that I like to use for some of the clients I work with. TwitterFeed will use any existing RSS or Atom feed and automatically twitter any new blog posts directly to your Twitter account. This can help syndicate your blog content to your followers and drive significant traffic back to your blog. It is very simple to set up and requires an OpenID account. TwitterFeed provides the option to post new links as fast as every 30 minutes. If you publish content on your blog frequently, this option maybe too much for your followers. Otherwise you can set it to post once a day with up to five of your latest blog entries.