When you sign-up at TwitterMail, you get a TwitterMail email address. If you send an email to that address it will be posted to your Twitter stream.
It provides an email extension to posting updates to Twitter.
Facebook to Twitter is an official app from Facebook that lets you link your Facebook page to Twitter. Now share...
Pu.ly is a simple email-to-twitter and back again system. Pu.ly automatically monitors Twitter for mentions of you, direct messages to...