| fll | Micrografx Designer Fill Pattern Data |
| TextPipe Pro Filter Data |
| flm | Autodesk AutoCAD Film Roll Data |
| CyberLink MediaShow Data |
| fln | XMap Flight Plan Data |
| flo | Automate Flowchart Data |
| LightCycler v3 Experiment Data |
| RFFlow Flowchart Data |
| WRAP Inflow IN Records Data |
| float | ARIA Server Float Data |
| floor | Structural Concrete Software Floor Data |
| flow | Microsoft Expression SketchFlow Data |
| flowmaplibrary | Corel Painter Flowmap Library |
| flp | ActivInspire Flipchart |
| FlipAlbum Data |
| Fractal Explorer Landscape Project |
| flr | Netscape Live 3D FLR Data |
| WinFlash Results File |
| fls | Creator Fault List File |
| Faro SCENE Scan Data |
| Stock Prospector Exported Data |
| WinFlash Flashcard Source |
| flt | Carlson 2016 Triangulated Irregular Network Data |
| Micrografx Picture Publisher Filter |
| Microsoft Word Input Filter |
| Miles Sound System Flat Data |
| OpenFlight Model Data |
| OpenOffice.org Filter Data |
| OS/2 Warp Filter Device Driver |
| Vue Filter Data |
| WinFlash Compiled Test |
| XMap Flight Plan Data |
| fltr | XTND Filter |
| flu | WinFlash Flashcard Source (new) |
| flw | Faro SCENE Entire Scan Data |
| Fluke LinkWare Database |
| flwa | Folder Lock Wallet File |
| flx | DataFlex Compiled Binary |
| Flexstor Database |
| MODTRAN FLX Output File |
| flxdato | OnScale Binary Results Data |
| flxext | OnScale Extrapolation Data |
| flxffl | OnScale Free Field Data |
| flxhst | OnScale Binary History Data |
| flxinp | OnScale Job Input Data |
| flxmdl | OnScale Binary Model Data |
| flxprt | OnScale Command Log Data |
| flxwrn | OnScale Warnings Data |
| fly | Quiz-Buddy Quiz Data |
| flys | Mapwing Streaming Tour |
| flz | CyberLink MediaShow Data |
| WinFlash Compiled Flashcard |
| fm | FileMaker Pro Data |
| fm2 | FCEUX 2 Movie Capture |
| fm3 | FCEUX 3 Movie Capture |
| FileMaker v3 Database |
| fm5 | FileMaker Pro Data |
| fma | FMAudit Exported Audit Data |
| PermitMD FMA Form Definition File |
| PTV VISSIM Matrix Data |
| fmap | Family Atlas Published Family Map |
| fmb | Corel WordPerfect File Manager Button Bar |
| fmc | FME Desktop Catalog Data |
| MotionArtist Animated Clip |
| fmd | FARSITE Custom Fuel Model |
| fmdb | Build-Quant Object Database |
| Ensoft Formulator Object Database |
| fme | FME Desktop Mapping Data |
| fmedb | Foto-Mosaik-Edda Mosaic Database |
| fmelic | FME License |
| fmf | FME Desktop Metafile |
| fmgen | FlexiMusic Generator Data |
| fmh | Family Medical History HD Data |
| fmi | FME Include File |
| fmk | GFI FAXmaker Data |
| fmk4 | FileMaker Pro for Mac Data |
| fml | Advansys Portable Message Format Data |
| OFML Scene Data |
| Oracle Mirror List Data |
| fmm | FreeMind MindMap |
