| ktw | KeyTweak Configuration |
| kuip | Kingsoft Office Personalization |
| kvm | KVM Configuration Data |
| kxc | KEA! X Server Settings Data |
| ky3 | RAC6181 Keypad Configuration |
| kyb | Keyboard Layout |
| kys | Adobe Photoshop Keyboard Shortcut Settings |
| las | Light-O-Rama Animation Sequence |
| launch | Zend Studio Debugger Configuration Data |
| lbu | Cloaked Affiliate Link Builder Settings |
| lcc | Capture One Lens Cast Correction |
| lcc | Light-O-Rama Channel Configuration |
| lct | Oracle Generic Loader Control File |
| ldr | WindLDR Ladder Diagram |
| ldt | Belkin Loadout Manager Data |
| lfmrc | Last File Manager Runtime Configuration Data |
| lfo | Alchemy Low Frequency Oscillator Presets |
| lily | PCSX2 LilyPad Configuration |
| lir | ADI Ocelot Configuration |
| list | APT Package Resource List |
| lkg | HP-UX LKG Configuration |
| lks | WinAMP Links |
| lmms | LMMS Configuration Data |
| 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 |
