When it comes to Twitter and tablets, Plume for Twitter is without a doubt at the top of the pack. Plume gives you an elegant interface for keeping up with your tweets: Its main screen shows three customizable columns for viewing your timeline, mentions, and any searches or lists you like. Tapping a tweet brings up a larger window with any relevant images plus options for replying, retweeting, and viewing the poster's profile. Plume even has its own optional built-in browser so you can open attached links without having to exit the program. The main Plume app is free but ad-supported; you can go ad-free with a $5 "premium" upgrade.