Synology Note Station - Without needing to spend money on Evernote, Synology Note Station provides a desktop client to organize all your random notes in one place.

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

UpNote - A beautiful and clean cross-platform app for notes organizer

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

Notesnook - Notesnook is a simple and private note taking app that keeps your notes organized and synced on your phone, tablet and computer.

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