Twitter falls under the weight of Gravity , the very first great-looking Twitter application for S60 handsets. It's not just a Twitter client, mind you, you can key in your identi.ca account details and access it too. We did take the application for an initial spin and came out pretty impressed. The application includes almost every feature you would probably expect from any self-respecting Twitter client. This includes tweet, reply, DM, follow and not-follow, create favorites, search, and even auto-update.

Twitter applications that were available for "hip" OS'es like iPhone and BlackBerry, the good ol' smartphone OS was left in the lurch and still had no sign of a decent application that would make tweeting a great experience on the Series 60 phone. Source (TechTree)