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

Alcamy - Free, open self-learning platform. Learn & teach anything.

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.

EduDo - EduDo is a video discussion platform

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

Lrnkey - Lrnkey.com is a global online marketplace that easily connects you to live instructors and tutors across the planet.