| 38468 | Cálculo de Áreas e Volumes | ZX-Spectrum 48K | Portuguese |
| 22985 | DHB | ZX-Spectrum 48K | English |
| 25747 | Dec to Hex | ZX-Spectrum 48K | English |
| 25748 | Dec-Hex | ZX-Spectrum 16K | English |
| 18020 | Dec-Hex | ZX-Spectrum 48K | Spanish |
| 27512 | Deducir | ZX-Spectrum 48K | Spanish |
| 28815 | Depreciation | ZX81 2K | English |
| 16490 | Derivadas | ZX-Spectrum 48K | Spanish |
| 8090 | Determinante | ZX-Spectrum 48K | German |
| 23564 | Determinantes | ZX-Spectrum 48K | Spanish |
| 14618 | Dez2Binary | ZX-Spectrum 48K | German |
| 26325 | Diaisto | ZX-Spectrum 48K | Italian |
| 43812 | Differentiation | ZX-Spectrum 16K/48K | English |
| 38479 | Dimensionamento de Veios à Fadiga | ZX-Spectrum 48K | Portuguese |
| 38480 | Dimensionamento de Vigas | ZX-Spectrum 48K | Portuguese |
| 37411 | DéfiMath | ZX-Spectrum 16K | French |
| 17972 | Ec. Diferen. | ZX-Spectrum 48K | Spanish |
| 18065 | Ecua | ZX-Spectrum 48K | Spanish |
| 18484 | Ecuac | ZX-Spectrum 48K | Spanish |
| 18500 | Ecuac 1 GR | ZX-Spectrum 48K | Spanish |