Star Chart - Stellarium is a planetarium software that shows exactly what you see when you look up at the stars. It's easy to use, and free. Read more about Star Chart.
Astronaut - You're an astronaut. Click to watch random videos in space.
Google Sky Map - Google Sky Map is a free hand-held planetarium that allows you to identify stars, planets and more.
Spacetime - Work hour and time zone management for distributed teams.
Code NASA - 253 NASA open source software projects
Eve of Impact - Missile Command meets Asteroids iOS game 🌍☄️