I wish PICO-8 was free (libre) software.

There is TIC-80[0] and PixelVision8[1] (interesting license) but I agree. It would be awesome for PICO-8 to be free (libre) software.

[0] https://github.com/nesbox/TIC-80

[1] https://github.com/PixelVision8/PixelVision8