The following are original C-Dogs/Cyberdogs heads, by Ronny Wester CC-BY 3.0 (see graphics/originals.txt)
- beard
- beret
- cyber_shades
- cyborg
- dutch
- eye_patch
- flattop
- goggles
- hogan
- mohawk
- ponytail
- professor
- riot_helmet
- shades
- ski_goggles

The following are derived from original C-Dogs/cyberdogs heads. Please still attribute to Ronny Wester using CC-BY 3.0
- donut
- mad_doc

The following are original and licensed as CC0

- combat_helmet
- hazmat
- helmet
- horns
- peak_cap