| 12514 | Crossword Puzzler | ZX-Spectrum 16K | English |
| 11628 | Cruisaid | ZX-Spectrum 48K | English |
| 40342 | Cryptograph | ZX-Spectrum 48K | English |
| 17462 | Cub Scout Pack | ZX-Spectrum 48K | English |
| 40722 | Cube Master | ZX81 16K | English |
| 39055 | Cucina | ZX-Spectrum 48K | Italian |
| 27628 | Cuentas | ZX-Spectrum 48K | Spanish |
| 39986 | Currency | ZX81 16K | English |
| 25741 | Currency Conversion | ZX-Spectrum 16K | English |
| 40248 | Currency Converter | ZX-Spectrum 48K | English |
| 11632 | Cut Your Heating Bills | ZX-Spectrum 48K | English |
| 27940 | Cycle Planner | ZX-Spectrum 48K | English |
| 39671 | Cypher | ZX81 16K | English |
| 17775 | Cypher | ZX-Spectrum 16K | English |
| 41433 | Cypher Breaker | ZX81 16K | English |
| 42053 | Cálculo de Esforços e Deslocamentos | ZX-Spectrum 48K | Portuguese |
| 44450 | Cálculo de Lajes | ZX-Spectrum 48K | Portuguese |
| 42054 | Cálculo de Propriedades de Soluções Químicas | ZX-Spectrum 48K | Portuguese |
| 42066 | Cálculo de Sismos | ZX-Spectrum 48K | Portuguese |
| 20060 | DIY for Micro Computers | ZX-Spectrum 48K | English |