The following categories exist on the wiki, and may or may not be unused. Also see wanted categories.
- Food (2 members)
- Freifunk (6 members)
- Freitagsfoo (675 members)
- Friday (2 members)
- Gaming (1 member)
- Geburtstag (2 members)
- Hack the Black Box (1 member)
- Hackathon (26 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 (883 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)
- Raum (36 members)
- Raumsteuerung (6 members)
- Resources (199 members)
- Rezept (1 member)
- Rezepte (1 member)
- RubyFoo (2 members)
- Sammelbestellung (15 members)
- Services (9 members)
- Short Talk (1 member)
- Sign (1 member)
- Spam blacklist (1 member)
- Sub-Etha (1 member)
- Tag des offenen Hackspace (3 members)
- Theoretical Computer Science (1 member)
- Todo (1 member)
- Toiletten (3 members)
- Toiletten WCs (1 member)
- Transcript Verlag (5 members)
- Users (1 member)
- VeganHack (2 members)
- Virtual Freitagsfoo (12 members)
- Workshop (83 members)
- Workstation (4 members)