QuizUp - QuizUp gives you the opportunity to test your trivia skills against friends and strangers throughout the world.
Trivia for Google Chat - Team-building w/ fun quizzes, games right inside Google Chat
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.
Social Games in Slack - Polly brings your WFH team together with interactive games
Google Feud - The world's most popular autocomplete game. Try to guess what Google will suggest. Webby Award Winner for Best Game. Created by Justin Hook.
Flinkit! - Web-hosted team building games for small and large companies