Trivia Crack - Produced by Etermax, Trivia Crack lets players answer trivia questions and compete against other people on mobile devices.

Tweedle App - Notion is nice but sometimes all you need is an app like Tweedle.

QuizClash - In QuizClash, you can challenge your friends or random opponents to a game of trivia.

Twicca - Twicca is a Twitter client for Android that is simply awesome. Features: * Notification

QuizUp - QuizUp gives you the opportunity to test your trivia skills against friends and strangers throughout the world.

Tweetbot - Sync your timeline across your iPhone, iPad, and Mac. Mute tweets by user, hashtag, tweet source, or keywords (including regex). 3rd Party support for image, video, read later, and timeline sync services.