| mmpz | LMMS Compressed Project |
| mobirise | Mobirise Project |
| moho | Anime Studio Animation Project |
| motn | Motion Project |
| mp | Autodesk Maya 3D Project |
| mp10 | NI Multisim 10 Project |
| mp11 | NI Multisim 11 Project |
| mp7 | NI Multisim 7 Project |
| mp8 | NI Multisim 8 Project |
| mp9 | NI Multisim 9 Project |
| mpdp | MixPad Project |
| mpj | Minitab Project |
| mpjx | Minitab Express Project |
| mppav | microPascal Pro for AVR Project |
| mppi | microPascal Pro for PIC Project |
| mpppi | microPascal Pro for PIC Project |
| mppz | MagicPlot Project |
| mprj | NI Maschine Project |
| mproj | Mine-imator Project |
| mproject | Merlin Project Project |
| mpz | Miradi Project |
| mra | Mari Project Archive |
| msdvd | Windows DVD Maker Project |
| mswmm | Microsoft Windows Movie Maker Project |
| mtp | WeintekHMI EasyBuilder 8000 Project |
| mtq | MINTEQA2 Project |
| muse | Adobe Muse Website Project |
| mvba | Bentley MicroStation VBA Project |
| mvd | Movie Edit Pro Video Project |
| mve | Muvee autoProducer v5 Project |
| mvex | Muvee autoProducer v6 Project |
| mvj | Moldex3D eDesign Project |
| mvp | MAGIX Movie Edit Pro Project |
| mvy | MAGIX Video Easy Project |
| mw2 | MicroWorlds Pro Project |
