The following categories exist on the wiki, and may or may not be unused. Also see wanted categories.
- Templates generating microformats (1 member)
- Templates that add a tracking category (2 members)
- Templates used by AutoWikiBrowser (1 member)
- Templates using TemplateData (3 members)
- Templates using TemplateStyles (11 members)
- Typing-aid templates (3 members)
- Wikimedia UI icons (1 member)
- Wikipedia XHTML tag-replacing templates (1 member)
- Wikipedia authority control (1 member)
- Wikipedia infoboxes (1 member)
- Wikipedia metatemplates (1 member)
- Wikipedia pages with incorrect protection templates (15 members)
- Wikipedia pages with strange ((documentation)) usage (3 members)
- Wikipedia substituted templates (3 members)