NASA's Perseverance rover landed last week carrying with it the Ingenuity
helicoptor as a technology demonstation. The purpose is to see if it is
possible to fly on Mars.

The helicoptor is built with off the shelf parts, open source software and runs on a Linux OS. Details here:
Mars Helicopter:
https://mars.nasa.gov/technology/helicopter/
To infinity and beyond: Linux and open-source goes to Mars:
https://www.zdnet.com/article/to-infinity-and-beyond-linux-and-open-source-goes-to-mars/