[SuperMouse]

If you develop hardware also have a look at the "CERN Open Hardware Licence"

[KolibriFly]

If you're doing open-source hardware and want to ensure improvements stay open

[SuperMouse]

Yes. All my OS projects have a strong Copyleft-clause.

Cannot stand companies stealing stuff and giving nothing back.

Thanks god they hate Copyleft licenses like the plaque.