Open Source Software for Mobile Phones

Tweetero is an open source Twitter client for Apple iPhone and iPod Touch released by ImageShack Corp.

iTwtr is a simple web-based Twitter client specifically designed for the iPhone. It was created by Dan Phiffer. iTwtr is open source, so you can hack on the code and run it on your own server.

Twim is a mobile Twitter client for Java enabled phones. You are able to view your recent time line, replies and your status archive. You are also able to update your current status from the application.

jibjib is an open source J2ME Twitter client designed for all twitter-ers on the road. One hand controls the wheel and another hand tweets along the road.