cFS

The engineering behind Artemis and SLS is a masterclass in safety-critical design. The quad redundant Primary runs on on a quadruple config PPC-750 CPU with the Green Hills Integrity OS and ARINC653 framework While the Back up is on a LEON 3 (SPARKV8) CPU using the VxWorks and NASA's CFS framework. (https://github.com/nasa/cFS) NASA actually makes all this publicly available information available on their NTRS server. Primary and BFS Info: https://ntrs.nasa.gov/api/citations/20190000011/downloads/20... Orion BFS: https://ntrs.nasa.gov/api/citations/20230002185/downloads/FS...

Aerospace specific software that goes to space or code that just happens to go to space as part of bigger projects? Here are a couple of the former: RTEMS https://www.rtems.org/ Core Flight System (cFS) https://github.com/nasa/cFS NASA has a lot of open source projects including a bunch that don't "go to space" but are used in space related projects (check each project for contributor guidelines): https://github.com/nasa/openmct - web based mission control software https://github.com/nasa/trick - simulation for for all phases of space vehicle development You should check out their github organization for all available projects (https://github.com/nasa). Also, European things as well such as the ESA's github organization: https://github.com/esa, and Germany's DLR: https://github.com/DLR-SC. Another good group to check out is TU Delft: http