wnr - Better than pomodoro, this timer app balances work and rest.

QuizUp - QuizUp gives you the opportunity to test your trivia skills against friends and strangers throughout the world.

Hourglass - Hourglass is the most advanced simple countdown timer for Windows.

A Google a Day - Online trivia game where you use Google's search to answer questions as fast as you can.

Free Countdown Timer - Free Countdown Timer is a free, full-featured and user-friendly countdown timer for Windows

Trivia Crack Kingdoms - The amazing quiz game that lets you test your knowledge and challenge your friends to see who is the smartest. Developed by Etermax