SpaceX Falcon 9 Lander - Try (and fail) to land Elon Musk's SpaceX rocket
Stellarium - Stellarium is a free open source planetarium for your computer.
SpaceVR - Explore space with Oculus Rift (pre-launch)
KStars - KStars is a Desktop Planetarium for KDE.
Coinbase Asset Management - Index funds, but for cryptocurrencies 💸
SkyView - SkyView is powerful, easy-to-use app that answers questions about stars, constellations, and more.