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 (649 members)
- Friday (2 members)
- Gaming (1 member)
- Geburtstag (2 members)
- Hack the Black Box (1 member)
- 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 (851 members)
- Mikrofoo (13 members)
- Nom (1 member)