| Name | Country | City | Rating | |
|---|---|---|---|---|
| Med Systems Software | 0.00 ±0.0 | |||
| Meg Edu-Pro, Inc. | 0.00 ±0.0 | |||
| Mega Assemblers Crew | Poland | 0.00 ±0.0 | ||
| Megamania Software | 0.00 ±0.0 | |||
| Megasof,t Inc. | 0.00 ±0.0 | |||
| Melbourne House | 0.00 ±0.0 | |||
| Melbourne House (Australia) Pty Ltd | Austria | Melbourne | 0.00 ±0.0 | |
| Melbourne House (Publishers) Ltd | United Kingdom | Richmond | 0.00 ±0.0 | |
| Memphis Atari System Hobbyists | 0.00 ±0.0 | |||
| Mercer Systems | 0.00 ±0.0 | |||
| Mercury Software | 0.00 ±0.0 | |||
| Merlin Enterprises | 0.00 ±0.0 | |||
| Merlin's Software | 0.00 ±0.0 | |||
| Merry Bee Communications | 0.00 ±0.0 | |||
| METRA | 0.00 ±0.0 | |||
| Metrosoft, Inc. | 0.00 ±0.0 | |||
| MG Productions | 0.00 ±0.0 | |||
| MHS | 0.00 ±0.0 | |||
| Mibusoft | 0.00 ±0.0 | |||
| Michael Kühn | 0.00 ±0.0 |
