| 38401 | Countdown and Chronograph | ZX-Spectrum 48K | Czech |
| 44284 | Countries - Africa - Cities | ZX-Spectrum 48K | English |
| 44285 | Countries - Africa - Features | ZX-Spectrum 48K | English |
| 44286 | Countries - Australia - Features | ZX-Spectrum 48K | English |
| 44287 | Countries - Australia - Towns | ZX-Spectrum 48K | English |
| 44288 | Countries - South America - Features | ZX-Spectrum 48K | English |
| 41058 | Course and Time | ZX81 16K | English |
| 25737 | Cover | ZX-Spectrum 48K | English |
| 8061 | Coverprinter | ZX-Spectrum 48K | German |
| 14813 | Crash Review Index 1984 | ZX-Spectrum 48K | English |
| 30462 | Credit Calculator | ZX-Spectrum 48K | English |
| 10477 | Cricket Averages | ZX-Spectrum 48K | English |
| 10478 | Cricket Averages | ZX-Spectrum 48K | English |
| 19989 | Cricket Averages | ZX-Spectrum 48K | English |
| 27891 | Cricket Duckworth-Lewis Calculator | ZX-Spectrum 48K | English |
| 26045 | Critical Path Analysis | ZX-Spectrum 48K | English |
| 40685 | Crossword | ZX80 | English |
| 9641 | Crossword Compiler | ZX-Spectrum 48K | English |
| 23260 | Crossword Help | ZX-Spectrum 48K | English |
| 24483 | Crossword Helper | ZX-Spectrum 48K | English |