- D Link
- D-Link
- D-link systems
- D-Toys
- D'ARPÈJE
- D3 Publisher
- Daan Tech
- Daedalic Entertainment
- Dan Austin Bryan Mann
- Danew
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- DAY ONE
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- DCG Eltronic
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- Dell
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- Devil Pig
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- Devolver Digital
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- Dickie Toys
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- Digital bros
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- Disney
- Disney Interactive
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- Disney Interactive Studios
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- Docteur Slime
- DOJO SYSTEM
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- DON'T NOD ENTERTAINMENT
- Donner
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- Dörr
- Dotemu
- Dovetail
- Dragon-Electronics
- Dreame
- DREAMWORKS
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- Duracell
- Duracraft
- Duronic
- Duux
- DYMO
- Dynabook
- DYNABOOK INC.
- Dynaudio
- Dynavox
- Dyson
