MacDown - MacDown is an open source Markdown editor for OS X, released under the MIT License.

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

Frost - An open API for Blockchain timestamping

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

iA Writer - Minimal Design, Maximum Focus

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