| 38071 | Climogramas | ZX-Spectrum 48K | Spanish |
| 8022 | Club Record Controller | ZX-Spectrum 48K | - |
| 21671 | Coastal Navigation | ZX-Spectrum 48K | English |
| 23510 | Cocina | ZX-Spectrum 48K | Spanish |
| 42845 | Cocktails | ZX-Spectrum 48K | Multi-language: English, Portuguese |
| 14622 | Code Machine 2068 | ZX-Spectrum 48K | English |
| 42089 | Codificador de Morse | ZX-Spectrum 16K | Spanish |
| 39830 | Colour Blindness Test | ZX-Spectrum 48K | English |
| 23641 | Combat Calculator - Spanish Civil War | ZX-Spectrum 48K | English |
| 23600 | Combat Calculator - World War 2 AFV | ZX-Spectrum 48K | English |
| 8034 | Comp-U-Share | ZX-Spectrum 48K | English |
| 13847 | Comp-U-Tax | ZX-Spectrum 48K | English |
| 39207 | Comp-U-Tax | ZX81 16K | English |
| 22316 | Compass | ZX-Spectrum 48K | English |
| 40363 | Compatibility | ZX-Spectrum 48K | English |
| 24480 | Complete Money | ZX-Spectrum 48K | English |
| 40691 | Complete Music | ZX80 | English |
| 40475 | Compound Interest | ZX81 16K | English |
| 40129 | Compound Interest | ZX-Spectrum 48K | English |
| 38611 | Compumeter | ZX-Spectrum 48K | Italian |