The following categories exist on the wiki, and may or may not be unused. Also see wanted categories.
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- Nom (1 member)
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- Party (25 members)
- Projects (78 members)
- R0ket (1 member)
- Raum (36 members)
- Raumsteuerung (6 members)
- Resources (190 members)
- Rezept (1 member)
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- RubyFoo (2 members)
- Sammelbestellung (15 members)
- Services (9 members)
- Short Talk (1 member)
- Sign (1 member)
- Spam blacklist (1 member)