Flight Pilot Simulator 3D - Unleash your inner maverick, become a pilot and CONQUER the skies!
Next! Fitness - A.I. powered gym
GeoFS - Free, Web based flight simulator with worldwide satellite images.
100 Hours Project - A simple offline way to keep yourself accountable
FlightGear - The FlightGear flight simulator project is an open-source, multi-platform, cooperative flight simulator development project. It also simulates space flight in Earth's orbit. It's flight dynamics engine (JSBSim) is used in a 2015 NASA benchmark.
Boost - Boost is an e-commerce for mobile, where users can generate hashtags for products and instantly sell and buyers can tweet to make a purchase