| lnst | Adobe InDesign Line Presets |
| locr | Mac OS X Location Manager Settings Data |
| lr | Chaos Desktop Layer Settings |
| lrsmcol | Adobe Photoshop Lightroom Smart Collection Settings |
| lrweb | Adobe Photoshop Lightroom Web Gallery Settings Data |
| lsv | Light-O-Rama Preferences |
| luacomp | PlayOn Settings Data |
| lvlps | LabVIEW Local Project Settings |
| lvt | Land Surface Verification Toolkit Configuration |
| lxc | Linux Containers Configuration |
| lxcp | LCARS x32 Color Profile |
| m2m | TiMidity++ M2M Settings |
| m4l | Sage MAS 90 Panel Settings |
| mailhost | MSN Explorer Mailhost Settings Data |
| mal | MadAppLauncher Configuration |
| mbc | ModBus Configuration File |
| mblook | Magic Bullet Looks Presets Data |
| mbxcfg | Molebox Configuration Data |
| mca | Massive Midi Setup |
| mccl | Emailer Connection Data |
| mce | Sixense MotionCreator Game Profile |
| mch | Machinery HDR Effects Settings |
| mcolor | Mine-imator Interface Color Settings |
| mcr | DataCAD Keyboard Macro |
| mcs | ModelCHECK Start Config |
| mcxml | Microsoft Office 2013 XML Settings Data |
| mdcf | MACE Data Configuration |
| mdpf | Mac OS X Modem Preferences Data |
| mdrc | MADRIX DMX Remote Configuration |
| mech | Pro/MECHANICA Settings Data |
| meu | MS-DOS Shell Menu Group Data |
| mgk | GraphicsMagick Configuration |
| mgk | ImageMagick Configuration |
| mhc | MPLAB Harmony Configuration File |
| milk | WinAmp MilkDrop Plugin Preset |