| 4000045 | Jupiter ACE Emulator | Timex Tx2068 | English |
| 2000524 | Jupiter ACE: FORTH Programming | Jupiter ACE | English |
| 44080 | Jurl | ZX-Spectrum 48K | English |
| 7497 | Just For Fun | ZX-Spectrum 48K | English |
| 2665 | Just Imagine | ZX-Spectrum 48K | English |
| 31161 | Just Not Fun Baby Fun | - | English |
| 10844 | Just One of Those Days | ZX-Spectrum 48K | English |
| 35160 | Just a Gal | ZX-Spectrum 48K/128K | English |
| 14947 | Just a Mot: French Vocabulary | ZX-Spectrum 48K | English |
| 43188 | K C Munchkin | ZX-Spectrum 48K | English |
| 2001456 | K Power: Computer Craziness | - | English |
| 2001457 | K Power: Computer Monsters | - | English |
| 2001458 | K Power: Computer Olympics | - | English |
| 2001459 | K Power: Computer Space Adventures | - | English |
| 31942 | K-Bird | ZX81 1K | English |
| 43556 | K-MAN | ZX81 1K | English |
| 16811 | K.O. Whist | ZX-Spectrum 48K | English |
| 22142 | K.P. Cash Bandit! | ZX-Spectrum 48K | English |
| 17651 | K22 | ZX-Spectrum 128K | English |
| 11085 | KA1 Assembler | ZX-Spectrum 48K | English |