| 41070 | Column Scroll | ZX81 16K | English |
| 22702 | Combinations | ZX-Spectrum 48K | English |
| 41295 | Combinations | ZX-Spectrum 48K | English |
| 16505 | Combinatoria | ZX-Spectrum 48K | Spanish |
| 39750 | Come From (April Fool) | ZX-Spectrum 16K/48K | English |
| 41476 | Compact QL Trace | Sinclair QL | English |
| 26857 | Compactor | ZX-Spectrum 16K | English |
| 27855 | Compactor | ZX-Spectrum 48K | Italian |
| 16512 | Compilador de Textos | ZX-Spectrum 48K | Spanish |
| 40106 | Compiler | ZX81 16K | English |
| 41400 | Complex Maths | ZX81 16K | English |
| 40416 | Compressor | ZX-Spectrum 48K | English |
| 37698 | Computer Haiku | ZX-Spectrum 16K | English |
| 40004 | Cones | ZX-Spectrum 48K | English |
| 25732 | Config | ZX-Spectrum 48K | English |
| 40461 | Constellations | ZX81 16K | English |
| 38580 | Contabilidade II | ZX-Spectrum 48K | Portuguese |
| 42123 | Controlo de Provas de Carros Telecomandados | ZX-Spectrum 48K | Portuguese |
| 38475 | Conversor ZX81 ZX Spectrum | ZX-Spectrum 48K | Portuguese |
| 23555 | Copion | ZX-Spectrum 16K | Spanish |