| ID | Name | Type |
|---|---|---|
| #9546 | Metalbrain | - |
| #19037 | Metalmickey | - |
| #19324 | Metalsoft | P |
| #9547 | Methodia Design Norway | Z |
| #9548 | Methuen London Ltd | Z |
| #9549 | Metro-Goldwyn-Mayer | Z |
| #9550 | Metroheath Ltd | Z |
| #9551 | Metsuke | ? |
| #9552 | Mevlüt Dinç | + |
| #16620 | Mezei Róbert | + |
| #17480 | Mi-Crowe | R |
| #9553 | MiC Software | Z |
| #9554 | MiCROL | P |
| #9555 | MiHaS | ? |
| #9556 | MiPH&T Hackers Club | Z |
| #23141 | MiPol | P |
| #9557 | Miami-Soft | Z |
| #9558 | Mic Haigh | ? |
| #9559 | Micha Design | Z |
| #9560 | Michael A. Hargreaves | + |