| 25729 | CLS | ZX-Spectrum 48K | English |
| 17925 | CLS Routine | ZX-Spectrum 16K | English |
| 8027 | COMAL 1.0 | ZX-Spectrum 48K | English |
| 8028 | COMAL 2.0 | ZX-Spectrum 48K | English |
| 20769 | COMALL | ZX-Spectrum 48K | English |
| 23809 | CP/M 2.2 for the LEC Memory Extension | ZX-Spectrum 48K | English |
| 42269 | Calculad0ra "Screens & Fonts" | ZX-Spectrum 48K | English |
| 28826 | Campbell Disassembler | ZX81 16K | English |
| 19898 | Chameleon C | ZX-Spectrum 48K | English |
| 42165 | Chip-Otto | ZX-Spectrum 48K | English |
| 37519 | Ciclometro | ZX-Spectrum 48K | Spanish |
| 22193 | Clearcut version 2 | ZX-Spectrum 48K | English |
| 19246 | Code Compressor | ZX-Spectrum 48K | English |
| 13142 | Code Compressor 1 | ZX-Spectrum 48K | English |
| 15763 | Code Investigator | ZX-Spectrum 48K | English |
| 27566 | Code Redactor | ZX-Spectrum 48K | English |
| 22315 | Codeline | ZX-Spectrum 48K | English |
| 22391 | Codeline Two | ZX-Spectrum 48K | English |
| 21991 | Codeshifter | ZX-Spectrum 48K | English |
| 38889 | Compilador BASIC | ZX-Spectrum 48K | Portuguese |