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

Teachable - Create and sell beautiful online courses with the platform used by the best online entrepreneurs to sell $100m+ to over 4 million students worldwide.

A Google a Day - Online trivia game where you use Google's search to answer questions as fast as you can.

Clever - syncing between education applications for K-12 schools

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

Claroline - Claroline is a collaborative eLearning and eWorking platform.