| .mit |
MineEdit Inventory Template File |
| .markdn |
Markdown File |
| .mrsn |
Mersenne Source Code File |
| .nb |
Mathematica Notebook |
| .nwp |
Magentic Wallpaper File |
| .nra |
Nero Audio Compilation |
| .nbp |
Mathematica Player Notebook File |
| .nmf |
ArcGIS Explorer Map File |
| .nomedia |
Android No Media File |
| .nt |
Windows NT Startup File |
| .nfo |
System Information File |
| .ny |
Audacity Nyquist Plug-in |
| .nwm |
Sony NWM Display Screen File |
| .nxc |
Not eXactly C Source Code File |
| .nls |
NetLogo Source File |
| .nqc |
Not Quite C Source Code File |
| .nbc |
Next Byte Codes Source Code File |
| .ned |
OMNeT++ Network Description File |
| .nsi |
NSIS Script |
| .nsh |
NSIS Header File |
| .nlogo |
NetLogo Model File |
| .nlogo3d |
NetLogo 3D Model File |
| .neko |
Neko Source Code File |
| .nk |
NUKE Script |