Quoted: Twitt(url)y is a service for tracking what URLs people are talking about as they talk about them on Twitter.

Quoted: Send private Twitter messages to specific groups of friends.

Quoted: twit+ Send files, images, video, flash and any other type of multimedia content to your twitter friends

Quoted: twhirl is a desktop client for the Twitter microblogging platform, powered by Adobe AIR.

Quoted:
Twitxr.com - A picture is worth a thousand words
With twitxr you can share a moment, a picture, a thought, instantly with your mobile phone

Quoted: What items are hot right now on twitter

Getting any feed twittering...

Quoted;
This stuff is Wowza Made with data coming all the way from Twitter and Google. Nice folks over there!