[sschueller]

https://github.com/thesourcerer8/altium2kicad

https://gitlab.com/kicad/code/kicad/-/merge_requests/60

[craftyjon]

KiCad 8 and newer have built-in importers for Altium schematics, boards, and libraries. See https://docs.kicad.org/9.0/en/kicad/kicad.html#importing_a_p... for more info.