- Curse Bird: Find out who’s swearing on Twitter
- Tweet What You Eat: Tweet what you’re eating at the moment – track your calories and weight
- Foodfeed: Similar to Tweet What You Eat, but just the tweet info
- Xbox 360 Gamer Tag: Automatically update twitter with what you are playing at a certain moment
- Trackthis: Track your packages via Twitter with this tool
- Bkkeeper: Share what you’re reading on Twitter
- Commuter Feed: Share tweets on traffic and transit delays
- Foamee: Fun way to tracks who you owe coffee or beer to
- InnerTwitter: Signals you through chimes where you have to let go of your thoughts.
- Post like a Pirate: Talk like a pirate on twitter
- Roll the dice: Give you the power to roll a dice on twitter. Useful when you’re betting or playing games with your friends.
- Xpenser: Track your expenses with twitter
- Twithire: The place where you can tweet job postings
- GasCalc: Tracks your gas usage and MPG on Twitter
- Fuel Frog ($): iPhone App with Twitter integration that also tracks Gas Usage and uses Twitter.
- Deal Tagger: Shop and share on Twitter
- Textgasm: Tweet your secrets
- Twitter Nonsense: Daily Twitter Comic Strip
- Twitterbox: A Twitter Client for Second Life
- Stocktwits: Lets you follow stocks on Twitter.
- Twictionary: A repository for all sorts of words used on Twitter.
- TweetValue: Tells you how much your profile is worth in US dollars.