The following categories exist on the wiki, and may or may not be unused. Also see wanted categories.
- Shows (3 members)
- Singers (4 members)
- Software using the BSD license (1 member)
- Songs (13 members)
- Source-to-source compilers (1 member)
- Species (1 member)
- Spike (2 members)
- Stink (3 members)
- Summoned (8 members)
- Sweet Escape (2 members)
- Sweet Escape Characters (15 members)
- Sweet Jazz City (3 members)
- Sweet Jazz City Locations (4 members)
- Sweet Jazz City Museum (2 members)
- Sylvester Ashling (3 members)
- Sylvester Ashling Summons (2 members)
- TWO-LOWEEN (1 member)
- TWO-LOWEEN Characters (8 members)
- Taiga Country (3 members)
- Taiga Country Locations (8 members)
- Talk Pages (12 members)
- Template documentation (13 members)
- Templates (27 members)
- Templates/Context-link (7 members)
- Templates/Infobox (8 members)
- Templates/Notice (1 member)
- Templates/Quote (1 member)
- Tetra's Templates (1 member)
- That Beautiful Sound Cover (2 members)
- The Doctor is In (3 members)
- The Doctor is In Characters (7 members)
- The Doctor is In Locations (3 members)
- Trixie Roughhouse (2 members)
- Unproduced Content (6 members)
- Unproduced Episodes (1 member)
- Unproduced Scripts (10 members)
- Unsourced Files (106 members)
- Unused Files (82 members)
- Upcoming Content (9 members)
- Videos (6 members)
- Villain Songs (3 members)
- Voice Only Characters (1 member)
- Web programming (1 member)
- Winner Take All (3 members)
- Winner Take All Characters (11 members)
- Winner Take All Items (2 members)
- Winner Take All Locations (2 members)
- World Lore (13 members)
- World of Epithet Erased (6 members)
- Zora Salazar (2 members)