The following categories exist on the wiki, and may or may not be unused. Also see wanted categories.
- Bernhard Hopfengärtner (13 members)
- Bibliothek (2 members)
- BioArt (1 member)
- Bio Art (1 member)
- Bioart (7 members)
- Biography (1 member)
- Blender (1 member)
- Braiding (1 member)
- Brian Larson Clark (8 members)
- C (9 members)
- CSS (4 members)
- CUDA (1 member)
- Cao Jing (1 member)
- Cellular Automaton (1 member)
- Chemical Geometry (1 member)
- Christian Doeller (1 member)
- Christine Hill (15 members)
- Cinema 4D (1 member)
- Cisco (2 members)
- Clemens Wegener (7 members)