Trivia Crack - Produced by Etermax, Trivia Crack lets players answer trivia questions and compete against other people on mobile devices.
Use Your Words! - A game you play using your phone or a browser to imput the awnser. Very similar to jackbox type of game.
QuizClash - In QuizClash, you can challenge your friends or random opponents to a game of trivia.
HappyFunTimes - A System for creating 10-100+ player local games
A Google a Day - Online trivia game where you use Google's search to answer questions as fast as you can.
Rocketcrab - Lobby service and launcher for mobile web party games.