| .kvtml |
KWordQuiz File |
| .kuip |
Kingsoft Office Personalization File |
| .mw |
Maple Worksheet |
| .mwx |
MapGuide Author Map Window XML File |
| .mxl |
Compressed MusicXML File |
| .mdx |
Warcraft 3 Model File |
| .msc |
Microsoft Management Console Snap-in Control File |
| .manifest |
Windows Application Manifest File |
| .mdc |
Multi Dimension Cube File |
| .mfo |
Perl ModInfo Descriptor File |
| .msdvd |
Windows DVD Maker Project File |
| .myapp |
Visual Studio Application XML File |
| .mum |
Windows Vista Update Package |
| .mft |
Kaspersky File Table |
| .mno |
Macromedia Design Note |
| .mws |
Maple Classic Worksheet |
| .mcl |
Windows Media Center Link File |
| .mxad |
Mandelbrot Explorer All Data File |
| .mobileconfig |
Apple Mobile Configuration File |
| .marshal |
Marshal Data Migration Model File |
| .mrml |
3D Slicer Scene Description File |
| .msrcincident |
Windows Remote Assistance Invitation File |
| .mailtoloc |
Mail Internet Location File |
| .mgk |
ImageMagick Configuration File |