The following categories exist on the wiki, and may or may not be unused. Also see wanted categories.
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- Documentation templates (1 member)
- Domesticat System (8 members)
- Drinkgender (47 members)
- Duplicate files (2 members)
- Eating Disorders (1 member)
- Eeveelutiogender System (2 members)
- Eldarin Gender System (8 members)
- Element System (21 members)
- Emotugender (18 members)
- Episodes (2 members)
- Events (3 members)
- Ever After System (6 members)
- Exclusionist Groups (10 members)
- Exclusive A-Spec Identities (33 members)
- Exclusive Genders (453 members)
- Exclusive Identities (626 members)
- Exclusive Romantic Orientations (13 members)
- Exclusive Sexualities (59 members)
- Exemgender (18 members)
- Expecgender (25 members)
- Fablegender (11 members)
- Fair use (84 members)
- Fantasy System (2 members)
- Faunagender (273 members)
- Felinus System (11 members)
- Feminine Genders (319 members)
- Fia/Fin Attraction (185 members)
- Fictigender (333 members)
- Fictional romance system (2 members)
- Ficto- Orientation (21 members)
- Files uploaded by their creator (178 members)
- Files with higher-quality versions available (13 members)
- Flagless Identities (160 members)
- Flagless Sexes (27 members)
- Flags (81 members)
- Flidfluff System (7 members)
- Floragender (127 members)
- Floral System (12 members)
- Floric System (7 members)
- Fluctuating Genders (208 members)
- Fluctuating Sexuality (9 members)
- Fluctuating genders (1 member)
- Fluid Genders (553 members)
- Fluid Romantic Orientation (21 members)
- Fluid Sexuality (151 members)
- Fluidflux Fragment Gender System (4 members)
- Foodgender (110 members)
- Fruitgender (12 members)
- Galactic Alignments (43 members)