- Unknown_copyright|I don't know exactly
- Free licenses:
- CC0|CC0: public domain
- CC-by-sa-4.0|Creative Commons Attribution ShareAlike 4.0
- GFDL|GFDL: GNU Free Documentation License
- GPL|GPL: GNU General Public License
- LGPL|LGPL: GNU Lesser General Public License
- Non-free license (exception):
- TC_screenshot|Turing Complete images