The following categories exist on the wiki, and may or may not be unused. Also see wanted categories.
- Hackathon (25 members)
- Hardware (1 member)
- Help (1 member)
- History (11 members)
- Host (40 members)
- Howto (3 members)
- Imported vocabulary (8 members)
- Kitchen (1 member)
- Lecture (9 members)
- Maintenance (7 members)
- Meet-Up (849 members)
- Mikrofoo (13 members)
- Nom (1 member)
- OpenChaos (2 members)
- Pages using deprecated source tags (4 members)
- Pages with broken file links (0 members)
- Pages with ignored display titles (4 members)
- Party (25 members)
- Projects (78 members)
- R0ket (1 member)