The Answer Bank - The Answer Bank is the UK’s leading question-and-answer site.

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

wikiHow - wikiHow is a wiki based collaboration to build the world’s largest, highest quality how to manual.

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

AllAnswered - Your Team's Collective Brain All-In-One Knowledge Management System Wiki + Q&A + Workflow + AI

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