The following categories exist on the wiki, and may or may not be unused. Also see wanted categories.
- IRC regulars (15 members)
- Icon images (61 members)
- Image insertion templates (5 members)
- Images (62 members)
- Images/fi (2 members)
- Images/pt-br (6 members)
- Images/ru (3 members)
- Images by license (8 members)
- Images lacking categories (0 members)
- Images that need improving (7 members)
- Images using ((Another license)) incorrectly (17 members)
- Images without license tags (26 members)
- Infobox templates (3 members)
- Intelligence Core players (5 members)
- Interface templates (3 members)
- Item images (1 member)
- Items (51 members)
- Items/cs (6 members)
- Items/da (1 member)
- Items/de (3 members)
- Items/es (14 members)
- Items/fi (48 members)
- Items/fr (21 members)
- Items/ko (1 member)
- Items/pl (38 members)
- Items/pt (1 member)
- Items/pt-br (49 members)
- Items/ru (48 members)
- Items/zh-hans (1 member)
- Items/zh-hant (11 members)
- Japanese (2 members)
- Jokes (1 member)
- Korean (1 member)
- LGPL images (4 members)
- Language-tracking categories (0 members)
- Language redirects (179 members)
- Language templates (22 members)
- Languages (22 members)
- Latvians (2 members)
- License templates (29 members)
- Licensing icons (9 members)
- Link insertion templates (3 members)
- Lists (14 members)
- Lists/cs (2 members)
- Lists/da (1 member)
- Lists/de (4 members)
- Lists/es (6 members)
- Lists/fi (13 members)
- Lists/fr (9 members)
- Lists/ja (2 members)