| 25180 | Cyklotron | ZX-Spectrum 48K | Polish |
| 1215 | Cytologie | ZX-Spectrum 48K | German |
| 25186 | Czas Relatywistyczny | ZX-Spectrum 48K | Polish |
| 28144 | Czasowniki Nieregularne cz. 1 | ZX-Spectrum 48K | Polish |
| 28124 | Cztery Dzialania | ZX-Spectrum 48K | Polish |
| 24895 | Czytaj i Pisz po Angielsku | ZX-Spectrum 48K | Polish |
| 38678 | Cálculo | ZX81 2K | Portuguese |
| 43022 | Cónicas | ZX-Spectrum 16K/48K | Spanish |
| 12541 | D-Logic | ZX-Spectrum 48K | English |
| 8080 | D.C. | ZX-Spectrum 48K | English |
| 38345 | D80 - Úvodná disketa | ZX-Spectrum 48K | Slovak |
| 26019 | Dam Attack | ZX-Spectrum 48K | English |
| 11635 | Dam and Blast | ZX-Spectrum 48K | English |
| 13184 | Dance Fantasy | ZX-Spectrum 48K | - |
| 20009 | Dartscore + Balance | ZX-Spectrum 48K | English |
| 38347 | Datašach | ZX-Spectrum 48K | Czech |
| 17446 | Dave's Dilemmas Part I | ZX-Spectrum 48K | English |
| 17447 | Dave's Dilemmas Part II | ZX-Spectrum 48K | English |
| 17448 | Dave's Dilemmas Part III | ZX-Spectrum 48K | English |
| 40194 | Day of the Week | ZX81 16K | English |