There are many Twitter applications on the Play Store, from the official Twitter application, to Plume, Tweetdeck or Seesmic. All of these have their own style and functionality. In Tweetdeck, you can customize the font and the number of columns in the application as well as connect to other services like Facebook and Foursquare. Seesmic has a similar feature set but uses a different UI style. Plume follows a Holo-like look and offers an impressive — and slightly daunting — amount of features.
The only major downside in most of these applications is that they lack UI color customization. Tweedle is a Twitter application that tries to close this gap with full UI theming freedom. However, it’s still in development and major updates are slightly sparse as the developer considers this his side-project.