AutoTweeter is a light weight tweet scheduler desktop application which can send automatic tweets to your twitter account.
You can use Autotweeter to tweet while you are away from your computer. Using Autotweeter, you can mass follow people, but automatically and slowly, so that your twitter account does not come under the spam scanner of twitter. The tweet, reply, follow request can be scheduled with a time interval.
AutoTweeter will send tweets according to the time interval you have specified. In addition to scheduling tweets, Autotweeter can also send quick tweets. Autotweeter also have built in URL shortening service using bit.ly.