Tweeticide - Tweeticide – Delete All Tweets is a commercial app that enables you to delete all of your tweets at once.
Tweedle App - Notion is nice but sometimes all you need is an app like Tweedle.
Wali - Share and create watchlists
Plume - App for writing documents, scripts, books and more.
Mountaintop Data - A B2B marketing intelligence company providing marketing lists as well as data cleaning, data appending, and data maintenance services.
Flamingo for Twitter - Flamingo for Twitter is a bright and colorful Twitter client that comes with a simple interface.