Nasa has just made a whole slew of its software freely available to the public as part of its 2017-2018 software catalogue. It includes apps and tools that Nasa itself uses to explore the mysteries of the universe.
All of the Nasa software is downloadable and is related to space travel, rocket launches and other technical guides. One such software is called "Knife", which is a library that "calculates the boolean subtraction of arbitrary watertight triangular polyhedral in order to make near-field sonic boom predictions". Unfortunately, some of Nasa's free software, like Knife, is only available for download within the US.
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