Hourglass - Hourglass is the most advanced simple countdown timer for Windows.
QuizUp - QuizUp gives you the opportunity to test your trivia skills against friends and strangers throughout the world.
wnr - Better than pomodoro, this timer app balances work and rest.
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.
Free Countdown Timer - Free Countdown Timer is a free, full-featured and user-friendly countdown timer for Windows
Trivia Crack - Produced by Etermax, Trivia Crack lets players answer trivia questions and compete against other people on mobile devices.