Padlet - Visual boards for organizing anything.
QuizUp - QuizUp gives you the opportunity to test your trivia skills against friends and strangers throughout the world.
Quizalize - Quizalize is a leading web-based and mobile-based classroom application that delivers the best and easiest way to differentiates your teaching.
A Google a Day - Online trivia game where you use Google's search to answer questions as fast as you can.
Kids A-Z - Kids A-Z created and published by Lazel Inc.
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