| ID | Name | Type |
|---|---|---|
| #3668 | Delta Software S.L. | Z |
| #3669 | Deltarho Software | Z |
| #19636 | Deltasoft | P |
| #3671 | Deltasoft [SK] | Z |
| #3670 | Deltasoft [UK] | Z |
| #3672 | Deltoid Developments | Z |
| #3673 | Delton T. Horn | ? |
| #19191 | Demens Deum | - |
| #3674 | Dementia | Z |
| #3675 | Demesta HB | ? |
| #19911 | Demige | - |
| #3676 | Demiurge ASH | ? |
| #3677 | Demon | ? |
| #3678 | Demon Software | Z |
| #17218 | Demon's Software | M |
| #3679 | Demos and Games Makers Software | Z |
| #3680 | Den | ? |
| #3681 | DenSSoft | Z |
| #3682 | Dendi | ? |
| #3683 | Dene T. Carter | + |