JavaScript.com - A free resource for learning and developing in JavaScript
QuizUp - QuizUp gives you the opportunity to test your trivia skills against friends and strangers throughout the world.
Learn JavaScript - Learn JavaScript with guided tests and flashcards
Buzz! The Big Quiz - Buzz! The Big Quiz is a Trivia, Party, Single and Multiplayer video game developed by Relentless Software and published by Sony Computer Entertainment.
The Ultimate SaaS Quiz - Challenge your friends and improve your SaaS knowledge
Trivia Crack - Produced by Etermax, Trivia Crack lets players answer trivia questions and compete against other people on mobile devices.