The following categories exist on the wiki, and may or may not be unused. Also see wanted categories.
- Developers (75 members)
- Developing Systems (6 members)
- Developing species (2 members)
- Development (51 members)
- Dietary effects (13 members)
- Dino Benson (1 member)
- Disambiguation pages (28 members)
- Disambiguations (1 member)
- Discovered (0 members)
- Distortion Cannon (4 members)
- Distortion Repeater (4 members)
- Distortion Scattergun (4 members)
- Distribution centers (0 members)
- Dominance-2 images (1 member)
- Doomsday (16 members)
- Dragonfly images (59 members)
- Dragonfly series (0 members)
- Drake DefenseCon 2953 images (0 members)
- Drake Defensecon (2 members)
- Drake Interplanetary (17 members)
- Driller images (5 members)
- Drink (1 member)
- Drinks (26 members)
- Drug labs (4 members)
- DustUp Helmet Star Kitten Custom images (4 members)
- DustUp Helmet images (1 member)
- DustUp images (2 members)
- DustUp set (4 members)
- Dwarf Planet (19 members)
- Dwarf star (0 members)
- Dwarf stars (1 member)
- Dynamic Event Missions (4 members)
- E1 Spirit images (14 members)
- ECN Alert Missions (2 members)
- EE16 (16x Telescopic) images (1 member)
- EM missiles (5 members)
- EM torpedoes (3 members)
- EVSD Cannon images (1 member)
- Earth (4 members)
- Easy Anti-Cheat images (2 members)
- Echo Eleven images (5 members)
- Eclipse Images (70 members)
- Eclipse series (0 members)
- Ectio images (1 member)
- Edibles (34 members)
- Eealus System (7 members)
- El (0 members)
- El'sin System (1 member)
- El-N (0 members)
- Ellis System (28 members)