Pixenio - Ready-to-use websites for your online business identity
SpaceVR - Explore space with Oculus Rift (pre-launch)
OpenMCT by NASA - A web based mission control framework
Astronaut - You're an astronaut. Click to watch random videos in space.
Open NASA - NASA data, tools, and resources
NASA Exoplanet Posters - Imagine visiting worlds outside our solar system