TwitterFone is great for when you're on the go - in the car, on a train, or running between meetings - and don't have WiFi or time to log on to the internet.

TwitterFone transcribes what you've said from voice to text, and posts it to your Twitter feed for you.

The service is free and just uses regular minutes from your regular phone plan. There are TwitterFone numbers in many countries, so you should always have a TwitterFone number near you.

When TwitterFone answers, just speak your tweet, and then hangup. TwitterFone will then transcibe your tweet and post it to Twitter. A short time after you call - typically 5-10 minutes - it'll be there.