If you're a geeky-type person, you probably already know this, but NASA (National Aeronautics and Space Administration) periodically releases free software to the general public. Their latest released happened a few weeks ago. The 2017-2018 Catalog can be accessed here.
As you would expect, a lot of what is available has to do with aeronautics, but there may be items of interest for the general population, for example Eyes on the Earth 3D "provides a generic means for people to interactively view the real-time location, speed and recent data gatherings of several of NASA's Earth observing Satellites using a 3-D graphical interface." Or, Station Spacewalk Game App, which "features simulations of Extravehicular Activities (EVAs) conducted by NASA astronauts on missions to the International Space Station."
TechCrunch.com has preselected a few things for you to look at, so that you don't have to go through pages and pages of software offerings, click here.