Plume - App for writing documents, scripts, books and more.
Janetter - Janetter is a Twitter client application. Faster, smarter, and more powerful.
Twicca - Twicca is a Twitter client for Android that is simply awesome. Features: * Notification
YoruFukurou - YoruFukurou (NightOwl) is a Twitter client for Mac OS X, designed for Twitter addicts.
Tweetlogix for Twitter - Tweetlogix for Twitter is the most leading Twitter tool that allows you to enjoy Twitter with a powerful and customizable client.
Tweeticide - Tweeticide – Delete All Tweets is a commercial app that enables you to delete all of your tweets at once.