Twicca is a Twitter app for Android that's loaded with features, such as support for Twitter lists, image-upload resizing, color-coded labels, and sharing to other apps. Among other helpful functions, it offers reply history, reply auto-complete, saved searches, recent hashtags, quoted retweets, GPS location geotagging, notifications, Bit.ly link shortening, and image previews. You can also use the app to edit your profile and change your avatar image, and you can adjust the font size in Settings.
One of Twicca's most interesting features is its support for a wide variety of third-party plug-ins that add functionality. Some of my favorites include URLy, a link shortener on steroids; Filckr, which helps you upload images to Flickr and embed the link in a tweet; the Tumblr plugin for uploading media or other files to Tumblr and embedding the link in a tweet, and the Image Download Plugin, which lets you download and save images embedded in tweets.
Twicca is in many ways the best Twitter client I have tried, except for two shortcomings: It does not support multiple Twitter accounts or scheduled tweets. You may have no need for those features, however--and if that's the case, I highly recommend that you give Twicca a try.?