Gimkit - A live classroom quiz game made by high school students
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.
TeenUp - A learning platform designed for teens by teens
Quesly - Test your knowledge, choose a category with 10 questions and solve your test in 100 seconds.