SmallDevTools - Handy developer tools with a delightful interface
NASA Exoplanet Posters - Imagine visiting worlds outside our solar system
Google Open Source - All of Googles open source projects under a single umbrella
SpaceVR - Explore space with Oculus Rift (pre-launch)
whatdevsneed - This is whatdevsneed.
Code NASA - 253 NASA open source software projects