QuizClash - In QuizClash, you can challenge your friends or random opponents to a game of trivia.
GitHub Classroom - Your course assignments on GitHub
Trivia Crack - Produced by Etermax, Trivia Crack lets players answer trivia questions and compete against other people on mobile devices.
Google Classroom - Learning management tool by Google
QuizUp - QuizUp gives you the opportunity to test your trivia skills against friends and strangers throughout the world.
Peergrade - A student feedback and grading platform