
TwitWho is a human-edited directory of Twitter users. It contains categories and each category has featured users, like arts, business and news. You can become an editor in TwitWho and help moderate the directory editing.
The Main Official Tweetiez Toolbar Blog
Twibble Mobile is a Java mobile Twitter app supporting wide range of mobile devices (Nokia, BlackBerry or any Java enabled mobile).
Twibble mobile has many features like uploading pics with TwitPic or any media (pic, text, audio and video!) with Mobypicture service. Also it supports identi.ca/laconi.ca instances. View all features of Twibble Mobile here. Not all these features come with the free version of Twibble Mobile. The full version is for 4.9 Euros.
Twibble was featured on many major websites like TechCrunch, Mashable, and BBC online.