TWEETSHEET YOURSELF!
Vizify's TweetSheet showcases revealing details from your tweetstream, including: top followers, geographic impact, most-retweeted posts, and more.
Add your Twitter backlog feed to your favorite calendar application and browse through your personal Twitter diary, making your Twitter history both fun and useful!
IM meets Twitter. Joint is an IM platform that uses your existing Twitter network. It takes away all the constraints of Twitter messaging and lets you have engaging, flexible, and realtime conversations.
"Chadderim keeps your information safe by using encryption. When you send a message, only the recipient can see it - everyone else, see only garbled, encrypted text. We do not have the key to unlock your message, so no one can read or track your messages."