QuizUp - QuizUp gives you the opportunity to test your trivia skills against friends and strangers throughout the world.
GameBot - Telegram's in-app gaming platform
A Google a Day - Online trivia game where you use Google's search to answer questions as fast as you can.
Facebook Instant Games - Play games right inside Facebook Messenger
Trivia Crack Kingdoms - The amazing quiz game that lets you test your knowledge and challenge your friends to see who is the smartest. Developed by Etermax
Imagzle - A (very) hard image based quiz game