Twidroyd (fka. Twidroid) is the leading full-featured Twitter client for Android
Twidroyd is the leading full-featured Twitter client for Android, with a customizable UberBar for easy navigation.
"Best Twitter App" -Engadget
"Get this app" Best Android Apps, O'Reilly media
"Top Android Essentials" -PCWorld

NOTE: uninstall the free version before upgrading!

Features:

* Multiple Twitter account support
* Customized Twitter notifications
* Conversation thread view
* Simultaneously post to Twitter and Facebook
* Multiple widgets
* Retweet with or without comment
* TMI/Twitlonger service
* Twitter lists
* Integrated Tweet and user search functionality
* Tweets near you
* Fully customizable UberBar .
* Pull-to-refresh as well as shake-to-refresh.
* "Mute” feature.
* LivePreview™.
* New features such as ShrinkTweet, and Insert Symbol.

There are also new themes available as separate downloads!
Now you can welcome Twitter A-listers Ashton Kutcher and Russell Simmons --as well as your favorite pro football Tweeters --to Twidroyd:
UncleUber, where entrepreneur and thought-leader Russell Simmons highlights the biggest happenings in hip-hop, entertainment and style. Includes news from GlobalGrind.com and the rest of the Simmons family, as well as a "Question of the Day" from Uncle Rush himself.

What's in this version : (Updated : Jun 5, 2012)

* Fixed remember timeline position when using back button to exit the app
* Pull-to-refresh bar is now smaller

Required Android O/S : 1.6+