| .mws |
Maple Classic Worksheet |
| .m2 |
World or Warcraft Model Object |
| .mmm |
Music Maker Arrangement File |
| .mxmf |
Mobile XMF Ringtone File |
| .mbr |
Master Boot Record File |
| .mx5 |
Mixcraft 5 Audio Project |
| .myr |
Myriad Music File |
| .mux |
Trackmania Music File |
| .mpdp |
MixPad Project File |
| .mxv |
Material Exchange Format |
| .musx |
Finale Notation File |
| .mmpz |
LMMS Project File |
| .minigsf |
Game Boy Advance Song File |
| .mmlp |
Music Macro Language Project |
| .mdr |
ModPlug Compressed Module |
| .m5p |
MachFive Preset File |
| .msmpl_bank |
Korg microSAMPLER Bank Data File |
| .mpu |
MPEG Layer 3 Audio File |
| .mp_ |
Mobile Phone Sound File |
| .msv |
Memory Stick Voice File |
| .mt2 |
MadTracker 2 Module |
| .mp1 |
MPEG-1 Layer 1 Audio File |
| .m1a |
MPEG-1 Audio File |
| .m2a |
MPEG-1 Layer 2 Audio File |