1. TwitSpy -It allows you to view real time updates on Twitter. It is similar to Digg Spy which lets you see in real-time as new Digg stories are posted to that site. With Twitspy you can view public and random tweets being posted real time..
2. Twixxer -Go beyond text on twitter. Twixxer allows you to share videos and photos on Twitter. To use this you can download Greasemonkey or Twixxer User Script
3. Twitter Q and A - It helps you ask questions to your followers and also answer their questions. It is like mini-version of Yahoo Answers on Twitter platform.
4. TwitterMeThis -It is a mashup of marketing with twitter crowd. Questions are posted, first user who answer them correct get $5 by paypal. Simple? Get set answering few of them.
5. Twubble - One cool way to expand your Twitter bubble. It searches your friend graph and picks out people who you may like to follow.
