The following categories exist on the wiki, and may or may not be unused. Also see wanted categories.
- Wallpapers (1 member)
- Web (3 members)
- Webdesign ? (1 member)
- Websites (132 members)
- Wiki (237 members)
- WikiCulture (1 member)
- Wiki Calendar (2 members)
- Wiki hives (9 members)
- Wikilandia (6 members)
- Wikimania (2 members)
- Wikimedia Commons (14 members)
- Wikimedia Projects (16 members)
- Wikipedia Asyl (1 member)
- Wikistats (41 members)
- Window Managers (6 members)
- Windows (76 members)
- Windows processes (2 members)
- Women (5 members)
- X3D (2 members)
- Yoga (81 members)