| Extension | File Type | Files scanned | Contributor |
| F/FC/FDO/FTX | Folded control info | 4 | |
| F | Freeze compressed data (v1.x) | 2 | |
| F | Freeze compressed data (v2.x) | 2 | |
| F | MathVISION Formula (v2.0) | 36 | |
| F | Photogenics Fractal | 17 | |
| F00 | Japanese Word Processor Kanji Font | 7 | |
| F01/F02/F99 | HEC-RAS Flow file | 10 | |
| F2R | Farandole Form 2.0 Linear module | 2 | |
| F3B | F3 Font | 36 | |
| F3D | Flare3D binary model | 23 | |
| F3D | Fusion 360 3D Design | 25 | |
| F3D | MotoRacer 3 bike model | 3 | |
| F3R | Farandole F3R blocked linear module format | 2 | |
| F3Z | Fusion 360 shared project archive | 10 | |
| F4M | Flash Media Manifest | 3 | |
| F4V | Flash Video (ISO Base Media File Format based) | 3 | |
| F64 | F64 disk image | 2 | |
| FA/FZA/MZA | Novastorm Media video | 11 | |
| FAB | Fabric design (v2.x) | 6 | |
| FABBPROJECT | netfabb Project | 6 | |
| FAC | IBM Storyboard Font | 4 | |
| FAC | PC Storyboard 1.0 Font | 4 | |
| FACE/FAC | FaceSaver bitmap | 4 | |
| FACE | Facer watch Face | 12 | |
| FACES | JavaServer FacesServlet pointer | 7 | |
| FACET | Facet file | 4 | |
| FACET | PageRender3D facet/object | 82 | |
| FACT/FAC | ElectricImage 3D model | 7 | |
| FACTORY | Simplify3D Factory session data | 11 | |
| FADEIN | Fade In document | 6 | |
| FAL/FAP | PerForm PRO LOCKEDFS | 2 | |
| FAL | Q0 bitmap graphic header info | 3 | |
| FAM | Flipper Application Manifest | 17 | |
| FAM | The Need For Speed textures | 14 | |
| FAMILYFILE | Reunion Family tree (v8) | 2 | |
| FAMILYFILE | Reunion Family tree (v9) | 2 | |
| FAMILYX | My Family Tree Family | 7 | |
| FAN | Ecstatica II game data | 2 | |
| FAN | Ecstatica game data | 3 | |
| FAP | Flipper Application | 115 | |
| FAP | PARIS Audio Format audio (little-endian) | 4 | |
| FAR | Farandole Composer module | 7 | |
| FAR | Fuchsia ARchive | 2 | |
| FAR | The Sims Archive | 8 | |
| FARC | FARC Playstation game data archive (generic) | 3 | |
| FARCONFIG | Far settings | 31 | |
| FARCONFIG | Far settings (UTF-8) | 3 | |
| FAS | AutoCAD Fast-load AutoLISP (FAS4) | 11 | ptweasel |
| FAS | AutoCAD LT Fast-load AutoLISP | 2 | |
| FASTQ/FQ | FASTQ format | 8 | |
| FAV | Outlook Shortcuts | 9 | |
| FAX | GPFax FAX format | 3 | |
| FAX | MultiFax FAX | 6 | |
| FAX | TrapFAX FAX | 10 | |
| FAX | Zyxel FAX format | 8 | |
| FAXX/FAX/IFF | IFF Facsimile image | 6 | |
| FB | FastBack Plus setup | 2 | |
| FB | Slim! compressed archive | 20 | |
| FB2 | FictionBook 2.0 eBook | 17 | |
| FB2K-COMPONENT | foobar2000 component | 28 | |
| FBC | FamilyTree Maker compressed backup | 7 | |
| FBD | Gravis Firebird 2 configuration | 3 | |
| FBD | Gravis Firebird configuration | 2 | |
| FBF | Free Backup Fix backup | 5 | |
| FBH | FirstBasic Help | 2 | |
| FBI | FLIP Bitmap | 5 | |
| FBI | Spring Engine unit Info | 52 | |
| FBI | Total Annihilation Main Unit Definition | 14 | |
| FBK | FamilyTree Backup File | 12 | |
| FBK | Telix Phonebook | 2 | |
| FBL | iGO map | 23 | |
| FBM | DELFTship ship | 3 | |
| FBM | FastBack Plus Macro | 8 | |
| FBM/CBM | Fuzzy Bitmap | 8 | |
| FBMOD | Frosty Tool Suite Mod | 11 | |
| FBP | wxFormBuilder Project | 14 | |
| FBP4/ATP | FinalBuilder Project (v4) / Automise Project (v1) | 9 | |
| FBP7 | FinalBuilder 7 Project | 8 | |
| FBR | Blueberry FlashBack screen Record | 7 | |
| FBRB | Battlefield Bad Company 2 game data | 2 | |
| FBS | FBIde session | 4 | |
| FBX | Autodesk - Kaydara FBX 3D format (Binary) | 21 | |
| FBX | Autodesk - Kaydara FBX 3D format (Text) | 13 | |
| FC | Future Composer v1.4 module | 127 | |
| FC | Sega compressed texture / 3d model File Container | 2 | |
| FC0 | FCE Ultra FC0 savestate | 19 | |
| FC3MAP | Far Cry 3 map | 8 | |
| FC7 | FastCAD for Windows drawing (V7) | 13 | |
| FCA | Omnis Web Client Form Cache | 18 | |
| FCD | EasyCAD drawing (generic) | 556 | |
| FCD | EasyCAD drawing (v1.x) | 14 | |
| FCD | EasyCAD drawing (v2.x) | 422 | |
| FCD | FastCAD drawing (generic) | 272 | |
| FCD | FastCAD drawing (v1.x) | 12 | |
| FCD | FastCAD drawing (v2.x) | 265 | |
| FCD | FidoCAD drawing | 8 | |
| FCD | Flow Charting 3 Drawing | 19 | |
| FCD | Virtual CD-ROM File | 3 | .Cryorb |
| FCF | Thrustmaster TARGET profile | 13 | |
| FCFG | Flirc Configuration (v1) | 13 | Joerg Jenderek |
| FCH | FC4WIN Media Hold File disk image | 8 | |
| FCI | Patton-Patton Flow Charting Image | 3 | |
| FCL | Facil text document | 7 | |
| FCL | FidoCAD Library | 3 | |
| FCL | Font Compiler and Loader format | 22 | |
| FCLR | Flowgorithm Color scheme | 5 | |
| FCM | FC-M Packer song/module | 2 | |
| FCM | FCE-Ultra movie capture | 3 | |
| FCM | FidoCAD Macro | 3 | |
| FCM | RoboDemo Margin | 72 | |
| FCO | FIASCO image/video | 32 | |
| FCP | Final Cut project | 12 | |
| FCP | FineCrypt encrypted (v2.0) | 2053 | occasus |
| FCP | FontCreator Project | 5 | |
| FCPXML | Final Cut Pro (X) XML project | 18 | |
| FCS | Flow Cytometry Standard format | 10 | |
| FCS | Foobar 2000 Columns UI settings | 24 | |
| FCSTD | FreeCAD Standard document | 100 | |
| FCT | FolderClone Task list | 5 | |
| FCT | Patton-Patton Flow Charting 6 Template | 39 | |
| FCV | ColecoVision Font | 22 | |
| FCW | FastCAD for Windows drawing (generic) | 12 | |
| FCX | Patton-Patton Flow Charting 6 document | 29 | |
| FD | FastDir-like quick directory lookup data | 3 | |
| FD | LaTeX Font Definition | 45 | |
| FD | LaTeX Font Definition (with rem) | 85 | |
| FD2 | EasyPrint PictureMate borders | 7 | |
| FDAT | Fiasco Data | 16 | Ruggero Furlanetto |
| FDB | EZ-Forms DB | 4 | |
| FDB | FT/Pro Form | 25 | |
| FDB | Fiasco Data Base definition (v1) | 16 | |
| FDB | Fiasco Data Base definition (v2) | 29 | Ruggero Furlanetto |
| FDB | Firebird DataBase | 39 | |
| FDB | PerForm DB definition (v2.x) | 5 | |
| FDB | PhotoDirector faces data | 6 | |
| FDB | Portfolio catalog | 99 | |
| FDB | Runes of Magic game data archive | 2 | |
| FDD | FlexiDATA Database | 5 | |
| FDD | FormDocs document | 4 | |
| FDD | Virtual Floppy Disk image (v1.00) | 8 | |
| FDF | Acrobat Forms Data Format | 7 | |
| FDF | Floppy Disk File image | 2 | |
| FDF | Origin Fitting Function Definition File | 158 | |
| FDF | SEU Format Definition File | 13 | |
| FDG | Cavewars dialog | 33 | |
| FDI | Anex86 PC98 floppy image (1.2MB) | 2 | |
| FDI | Anex86 PC98 floppy image (1.44MB) | 2 | |
| FDI | Anex86 PC98 floppy image (640KB) | 2 | |
| FDI | Anex86 PC98 floppy image (720KB) | 2 | |
| FDI | Anex86 PC98 floppy image (generic) | 18 | |
| FDI | Formatted Disk Image (gen) | 10 | |
| FDI | Formatted Disk Image (v1.0) | 8 | |
| FDI | Formatted Disk Image (v2.0) | 7 | |
| FDI | Formatted Disk Image (v2.1) | 5 | |
| FDI | Full Disk Image | 3 | |
| FDM | Floppy Disk Manager disk image | 7 | |
| FDM_MATERIAL | FDM Material info | 138 | |
| FDNEUT | FIDAP Neutral format | 6 | |
| FDOC | XPS FixedDocument object | 3 | |
| FDOC | XPS FixedDocument object (UTF-8) | 3 | |
| FDP | FMOD Designer Project | 9 | |
| FDR | Final Draft document | 14 | |
| FDS | Famicom Disk System disk image | 6 | |
| FDS | Famicom Disk System disk image (header-less) | 513 | |
| FDS | FireDAC database | 20 | |
| FDS | Form DB Set | 3 | |
| FDT | FormDocs template | 39 | |
| FDX | FDX68 disk image (generic) | 6 | |
| FDX | FDX68 disk image (rev.3) | 4 | |
| FDX | Final Draft Script | 6 | |
| FDX | Food Data Exchange | 15 | |
| FEA | PLS-CADD Feature code | 4 | |
| FEAT | Vuforia QCAR Feature | 2 | |
| FEATURE | Gherkin Feature | 13 | |
| FEC | FEC electronic filing format | 60 | |
| FED | FORMIK form | 26 | |
| FEED-MS | Microsoft Feed | 13 | Joerg Jenderek |
| FEEDBACK | Expression SketchFlow Feedback | 3 | |
| FEEDSDB-MS | Microsoft RSS Feeds Store | 17 | Joerg Jenderek |
| FEF | Flow Charting 3 Export Filter | 3 | |
| FEF | Patton-Patton Flow Charting 3 Export Filter | 3 | |
| FEM | Algor FEMPRO model | 5 | |
| FEM | Finite Element Method Magnetics model | 20 | |
| FEN | Picasa Windows info | 18 | |
| FES | FES BASIC source | 16 | |
| FET | FET Timetable | 29 | |
| FEV | FMOD Audio Events | 8 | Masamune3210 |
| FEV | Fractal Explorer View data | 4 | |
| FE_LAUNCH | FCS Express Layout Link | 9 | |
| FF | Call of Duty game data | 14 | |
| FF | farbfeld bitmap | 2 | |
| FF1 | Avery Font | 8 | |
| FF11DATSET | Noesis Final Fantasy XI Data Set | 2 | |
| FFA | Microsoft Fast Find status | 8 | |
| FFD | FFDDumper log | 4 | |
| FFDATA | ABBYY eForm Filler data | 7 | |
| FFE | Microsoft DirectInput Force Feedback Effect | 104 | |
| FFF | Gravis UltraSound PnP InterWave patch | 2 | |
| FFF | Imacon 3F raw image | 10 | |
| FFF | Simplify3D printer profile | 43 | |
| FFL | Fast Find document List | 6 | |
| FFLI | Flickering Flexible Line Interpratation bitmap | 2 | |
| FFM | FFM module | 9 | |
| FFN | Electronic Arts Font (generic) | 4 | |
| FFN | FIFA game serie Font | 5 | |
| FFN | The Need For Speed Font | 2 | |
| FFNA | Guild Wars gamedata | 2 | |
| FFP | FLAC Fingerprint | 14 | |
| FFR | FFR archiv format | 2 | |
| FFS | Forge File System game data archive (v1.0) | 2 | |
| FFS_GUI | FreeFileSync configuration | 11 | |
| FFT | Font FX Template | 22 | |
| FFT | IBM Final-Form Text document | 5 | |
| FFX | Microsoft Fast Find Index v1.x | 7 | |
| FFX | PC Animate Plus Frame F/X | 3 | |
| FFXML | Filter Forge filter | 13 | |
| FG | FaceGen face coordinates | 2 | |
| FG | Fred Gray module | 4 | |
| FG4 | FASTGEN Model | 9 | |
| FGD | Flight Sim Toolkit Gauges | 22 | |
| FGF | FGF bitmap | 2 | |
| FGSF | Google Files Safe Folder encrypted | 5 | |
| FGX | Formula Graphics project | 12 | |
| FH* | Freehand (MX) Project (generic) | 23 | Alex Paven |
| FH10 | Freehand 10(MX) Project | 20 | Alex Paven |
| FH2 | FreeHand drawing (v2) | 2 | |
| FH3 | FreeHand drawing (v3) | 2 | |
| FH4/FH5 | FreeHand drawing (v4-5) | 2 | |
| FH7 | FreeHand drawing (v7) | 2 | |
| FH8 | FreeHand drawing (v8) | 2 | |
| FH9 | FreeHand drawing (v9) | 2 | |
| FHF | Cleanersoft Free Hide Folder data | 2 | |
| FHP | Flow Charting 3 Help | 3 | |
| FHS | FHSpread spreadsheet | 4 | |
| FI | Norton FileInfo data | 5 | |
| FIB/FID/FIH/FIP/FIV | File Investigator data (generic) | 7 | |
| FIC | WINDEV HFSQL data base | 272 | |
| FID | Felix format spectra | 10 | |
| FID/SPC/2D/001/002/003 | NUTS format | 26 | |
| FIDB | Ghidra Function ID Dataset (packed) | 20 | |
| FIDBF | Ghidra Function ID Dataset (unpacked) | 67 | |
| FIDX | Fiasco Index | 17 | Ruggero Furlanetto |
| FIF | Fractal Image Format bitmap | 4 | |
| FIF | Fractal Image Format bitmap (alt) | 2 | |
| FIF | RR Report Writer Font Information File | 9 | |
| FIG | Cabri 3D Figure | 172 | |
| FIG | DeskMate Draw drawing | 26 | |
| FIG | FIG vector drawing | 6 | |
| FIG | Playmation Figure | 49 | |
| FIL | 1dir+ Generate Utility programs list | 4 | |
| FIL | AVG Antivirus Vault file | 12 | |
| FIL | AVG Antivirus Vault file (v7) | 4 | |
| FIL | Axis Game Enhancement Modules | 2 | |
| FIL | DeskMate Filer database | 23 | |
| FIL | FleetStreet Installation archive | 2 | |
| FIL | WordPerfect help | 3 | Joerg Jenderek |
| FIL | WordPerfect overlay | 3 | Joerg Jenderek |
| FILE | F.R.A.C. project | 4 | |
| FILM | Amiga Murder video | 12 | |
| FILM | The Director animation/slideshow (v1) | 4 | |
| FILM | The Director animation/slideshow (v2) | 3 | |
| FILTER | EPSILON wavelet Filter | 31 | |
| FILTERS | Visual Studio C++ project Filters | 38 | |
| FILTERS | Visual Studio C++ project Filters (UTF-8) | 325 | |
| FIM | FaceGen UV remapping transform | 19 | |
| FIM | Paul van Keep's Icon Heaven icons package | 67 | |
| FIN | Corel saved find/search | 5 | |
| FIN | Corel saved find/search (old) | 10 | |
| FIN | Finesse document | 8 | |
| FIT | Garmin Flexible and Interoperable data Transfer | 85 | |
| FIT | Mechwarrior FIT data | 20 | |
| FITS/FIT/FTS/FZ | Flexible Image Transport System bitmap (gen) | 24 | |
| FIZ | Maximus installer archive format (new) | 10 | |
| FIZ | Maximus installer archive format (old) | 6 | |
| FKS | Aer: Memories of Old save game | 24 | |
| FL32 | FilmLight bitmap | 2 | |
| FLA | Flash Authoring / source material | 149 | .Cryorb |
| FLA | Flash authoring source (CS5) | 13 | |
| FLAC/FLA | FLAC lossless compressed audio | 45 | |
| FLAME | Fractal Flame Parameters | 39 | Kyosuke Aoki |
| FLASKENV | Flask Environment settings | 3 | |
| FLASKENV | Flask Environment settings (with rem) | 4 | |
| FLATPAKREF | Flatpack Reference | 32 | |
| FLATPAKREF | Flatpack Reference (with rem) | 8 | |
| FLATPAKREPO | Flatpack Repo | 7 | |
| FLC | FIGfont control file | 4 | |
| FLC | FIGfont control file (zipped) | 4 | |
| FLC | FLIC FLC video | 10 | |
| FLD | AVS Field data | 13 | |
| FLD | Fold(ed) compressed archive | 37 | |
| FLD | The DataMaster Fields Definition | 3 | |
| FLD | YSFlight scenery Field | 30 | |
| FLEX | Evotec/PerkinElmer Opera Flex | 14 | |
| FLF | FIGfont | 28 | .Cryorb |
| FLF | FIGfont (zipped) | 247 | |
| FLF | Turbo Rascal Syntax Error graphic | 216 | |
| FLH | Flash: Fast Library Utility archive | 4 | |
| FLI | Autodesk Animator | 76 | |
| FLI | FLIC FLI video | 9 | |
| FLI | Flexible Line Interpretation bitmap | 2 | |
| FLIF | Free Lossless Image Format bitmap | 2 | |
| FLIM | Flim video | 8 | |
| FLIPCHART | ActivInspire Flipchart | 19 | |
| FLL | TextPipe Filter List | 392 | TrentSkunk |
| FLM | Animatic Film | 4 | |
| FLM | AutoCAD/AutoShade Film roll | 4 | |
| FLM | Flasm disassembled Flash ActionScript bytecode | 13 | |
| FLM | Foreign Language Master dictionary | 18 | |
| FLM | Novastorm Media animation | 2 | |
| FLM | Stunt Island Film | 17 | |
| FLM/VID/VSQ | Video Master Film/Video/Sequence | 3 | |
| FLMAPPING | FL Studio Mapping | 9 | |
| FLO | RFFlow diagram | 2 | |
| FLOW | Expression SketchFlow data | 6 | |
| FLOW | Maple Flow document | 11 | |
| FLP | 2FILE disk image | 4 | |
| FLP | Activstudio Flipchart | 13 | |
| FLP/FST | FL Studio Track | 493 | Mario "JarreFan" |
| FLP | Flash Project | 8 | |
| FLP | FlipAlbum data | 23 | |
| FLR | InfoFile database (v1.0) | 3 | |
| FLR | Pen Pal data base | 4 | |
| FLS/RAM | SaveRam2 compressed data | 102 | |
| FLS | WinFlash Flashcard Source (v2) | 3 | |
| FLSX/FLWX | FileLocator Pro workspace/search (v8.0) | 8 | |
| FLT | ESS-Code Filter | 11 | |
| FLT | OpenFlight 3D file | 3 | |
| FLT | Qimage Filter | 18 | Rizla99 |
| FLT | Syntrillium CoolEdit Filter | 46 | |
| FLT | Their Finest Hour: The Battle of Britain mission | 85 | |
| FLT | Thermicroscopes SPMLab FP data | 7 | |
| FLT | WinMerge directory/file Filter | 12 | |
| FLU | Full Throttle game data | 5 | |
| FLV | Flash Video | 6 | |
| FLW | Kivio Flowchart | 6 | |
| FLW | Light-Flowcharter diagram | 6 | |
| FLX | FlexTrax module (6 chan.) | 7 | |
| FLX | FlexTrax module (8 chan.) | 9 | |
| FLX | FormWorx for DOS Foreign Language table | 58 | |
| FM | Art Of Noise MF instrument (v1.x) | 33 | |
| FM | FrameMaker document | 25 | |
| FM | Motorola TxWin Form | 11 | |
| FM- | Cobra Adress Plus Format (generic) | 43 | |
| FM2 | FCEUX movie capture | 17 | |
| FM3 | Formatting Data for Lotus 1-2-3 worksheet (V3) | 25 | Joerg Jenderek |
| FMB | Oracle Binary Form | 15 | |
| FMD | Cumulate Draw's editable FMD format | 6 | |
| FMD | Flight Sim Toolkit Model | 41 | |
| FMD | Open Access II spreadsheet | 13 | |
| FMD | Open Access III spreadsheet | 14 | |
| FMDL | Fox Engine Model | 6 | |
| FMEDB | Foto-Mosaic-Edda Data Base | 2 | |
| FMF | Flipper Music Format | 9 | |
| FMF | Fuse Movie File video (compressed) | 2 | |
| FMF | Fuse Movie File video (uncompressed) | 3 | |
| FMF | LinkWay Font | 13 | |
| FMI | FMTracker Instruments | 2 | |
| FMI | Oracle FM Instrument | 6 | |
| FMK | FM-Kingtracker module | 5 | |
| FML | FCEditor XML project | 9 | |
| FML | Oracle FM instruments Library | 22 | |
| FMM | The Need For Speed windshield shape | 18 | |
| FMO | dBASE compiled Format | 4 | |
| FMP | Gravity Force Map | 4 | |
| FMP | The Fractal Mapper map | 20 | |
| FMP12 | FileMaker Pro database (v12) | 67 | |
| FMRPIV/DAT | ANSI/INCIT 378 fingerprints format (2004) | 2 | |
| FMRPIV/DAT | ANSI/INCIT 378 fingerprints format (2009) | 2 | |
| FMRPIV/DAT | ANSI/INCIT 378 fingerprints format (2009/AM1) | 2 | |
| FMRPIV/DAT | ANSI/INCIT 378 fingerprints format (gen) | 8 | |
| FMS | CRI FMS text strings data | 4 | |
| FMS | FamiStudio module | 8 | |
| FMT | FM Tracker module | 3 | |
| FMT | FMTracker module | 4 | |
| FMT/FJ3 | Formatting data for Lotus 1-2-3 worksheet (V2) | 47 | Joerg Jenderek |
| FMV | Famtasia movie capture | 2 | |
| FMV | Machine Hunter Full Motion Video | 9 | |
| FMV | Reaper video | 2 | |
| FMX | FileMaker Pro 32-bit plug-in | 62 | Adam Dempsey |
| FMX | Oracle Executable Form | 13 | |
| FMX64 | FileMaker Pro 64-bit plug-in | 31 | Adam Dempsey |
| FMZ | Form*Z Project | 19 | |
| FN | STK Facility Network | 5 | |
| FN3 | Harvard Graphics Font (v3.x) | 7 | |
| FNC | Vue D'Esprit 4 function definition | 92 | Alex Paven |
| FNC | Vue D'Esprit function definition (generic) | 93 | Alex Paven |
| FND | Windows Explorer saved search | 3 | |
| FNF | PTC FEM Neutral Format model | 7 | |
| FNK | FunkTracker module | 7 | |
| FNS | Free Notes document | 8 | Kenneth Pierce |
| FNT | 2FAX Font | 10 | |
| FNT | AngelCode Bitmap Font (XML) | 4 | |
| FNT | AngelCode Bitmap Font (binary) | 14 | |
| FNT | AngelCode Bitmap Font (text) | 28 | |
| FNT | Assault Wing Font | 5 | |
| FNT | Bannermania font | 14 | |
| FNT | Bitstream Font | 16 | |
| FNT | CHAOS Metafont Font | 11 | |
| FNT | Caiman Font data | 8 | |
| FNT | Computer Associates Font (v1.0) | 15 | |
| FNT | DIV Games Studio Font | 55 | |
| FNT | Deluxe Font | 4 | |
| FNT | DynaCADD vector Font | 17 | |
| FNT | Dynamic Publisher Font | 40 | |
| FNT | Dynamic Publisher Font II | 8 | |
| FNT/BLK | Dynamix Font data container | 2 | |
| FNT | Elecbyte M.U.G.E.N. font | 5 | |
| FNT | FONTX2 Font | 9 | |
| FNT/GFT | GEM GDOS font | 42 | |
| FNT | GRX Font | 541 | |
| FNT | GeoWorks GEOS font | 18 | |
| FNT | Home Video Producer Font | 13 | |
| FNT | Knowledge Adventure Font | 6 | |
| FNT | Makkoya Font | 5 | |
| FNT | Makkoya Font (alt.) | 9 | |
| FNT | Matrox Font (v3.x) | 4 | |
| FNT | MegaPaint Font | 4 | |
| FNT | Metagraphics Font | 31 | |
| FNT | Olitext Font | 56 | |
| FNT | PC Tools Font (v7.x) | 2 | |
| FNT/SET | Personal Font Maker Font/character Set | 27 | |
| FNT | PolyPlot Font | 34 | |
| FNT | Postal Font | 4 | |
| FNT | QuickCrt Font | 13 | |
| FNT | RIPterm Font | 2 | |
| FNT | RIX SoftWorks Font | 36 | |
| FNT | ReneFNT Font | 2 | |
| FNT | Take-Two Interactive Software Font | 5 | |
| FNT | Telepaint Font | 28 | |
| FNT | The Print Shop Deluxe Font | 30 | |
| FNT | Towns OS Font | 6 | |
| FNT | VFONT Font | 10 | |
| FNT | Westwood Font Format (v3) | 2 | |
| FNT | Westwood Font Format (v4) | 2 | |
| FNT | Windows Font resource (v1) | 5 | Joerg Jenderek |
| FNT | Windows Font resource (v2) | 19 | Joerg Jenderek |
| FNT | Windows Font resource (v3) | 9 | Joerg Jenderek |
| FNT | XCar Font | 3 | |
| FNT | Yountel Unicode font | 6 | |
| FNXML | Foenix IDE project | 8 | |
| FO/XML | XSL Formatting Objects | 7 | |
| FO/XML | XSL Formatting Objects (UTF-8) | 8 | |
| FOAM | Foam (ASCII) | 12 | |
| FOAM | Foam (ASCII, with rem) | 24 | |
| FOD | WIFE Font Driver | 12 | |
| FODG | OpenDocument Flat XML Graphics | 29 | Joerg Jenderek |
| FODP | OpenDocument Flat XML Presentation | 12 | |
| FODS | OpenDocument Flat XML Spreadsheet | 13 | |
| FODT | OpenDocument Flat XML Document | 14 | |
| FOG | Fontographer Font (v3-4) | 2 | |
| FOGUI | FOnline Engine GUI | 12 | |
| FOGUISCHEME | FOnline Engine GUI Scheme | 6 | |
| FOL/PFS | First Choice database | 3 | |
| FOL | Fold compressed | 9 | |
| FON | Beyond Words Composer Font | 45 | |
| FON/FNT | Dr. Halo Font | 102 | |
| FON | Fujitsu composite Font | 12 | |
| FON | Gee! Font | 12 | |
| FON | Ichitaro Font | 19 | |
| FON | Light-Flowcharter Font | 11 | |
| FON | PC-Draft-CAD Font | 5 | |
| FON | PrintPartner Font | 38 | |
| FON | Psion Font | 2 | |
| FON | Psion fast Font | 2 | |
| FON | Space Quest V Font | 14 | |
| FON | Windows Font | 156 | |
| FONT | Amiga bitmap Font | 45 | Joerg Jenderek |
| FONT | Amiga bitmap Font (var.2) | 2 | |
| FONT | DemoManiac Font | 3 | |
| FONT | SerenityOS Font | 55 | |
| FONT | Telltale Games Font (5VSM) | 2 | |
| FONT | Telltale Games Font (6VSM) | 2 | |
| FONT | Telltale Games Font (ERTM) | 2 | |
| FONT | Telltale Games Font (VSM) | 2 | |
| FONTSPEC | Font Specifications | 17 | |
| FONTSPEC | Font Specifications (with rem) | 8 | |
| FOR | CHAOS Forge data | 7 | |
| FORM | FormLabs PreForm job | 4 | |
| FORM | Gambas form (v2) | 28 | |
| FORM | Gambas form (v3) | 9 | |
| FORM | PreForm 3D object container | 6 | |
| FORM | The DataMaster Form | 2 | |
| FORMAT | Ardour export Format spec. | 14 | |
| FOS | Fallout 3 save game | 573 | fenixproductions |
| FOS | Fallout 4 save game | 4 | |
| FOSSIL/DB | Fossil configuration data base | 1 | Joerg Jenderek |
| FOSSIL/FSL | Fossil repository data base | 1 | Joerg Jenderek |
| FOT | Win 3.x Installed TrueType Font | 14 | |
| FOUNTAIN | Fountain Script | 9 | |
| FOX | Furcadia Art | 10 | |
| FP | FinePrint saved output | 10 | TBeu |
| FP | FuturePlayer module | 6 | |
| FP | GoldMine report | 84 | |
| FP/FT | Paradox Form Properties | 72 | | NEW! |
| FP2/FUN | Funpaint 2 bitmap | 5 | |
| FP3 | FastReport Prepared report | 33 | |
| FP3 | FileMaker Pro 3 database | 167 | |
| FP3 | FloorPlan Plus/3D Drawing | 2 | |
| FP5 | FileMaker Pro database (v5) | 29 | |
| FP7 | FileMaker Pro database (v7-11) | 38 | Adam Dempsey |
| FPA | Finale Performance Assessment | 2 | |
| FPAGE | XPS FixedPage object | 5 | |
| FPAGE | XPS FixedPage object (UTF-8) | 5 | |
| FPC | FreePCB project | 13 | |
| FPD | Flow Charting 3 Printer Definition | 25 | |
| FPD | Patton-Patton Flow Charting 3 Printer Driver | 4 | |
| FPD | TMT Pascal compiled unit (v2.x) | 13 | |
| FPD/FPO/FPW | TMT Pascal compiled unit (v5.x) | 123 | |
| FPD | TMT Pascal for DOS object code (v3.5) | 41 | |
| FPD/FPL/FPU | TMT Pascal for OS/2 object code | 11 | |
| FPF | FLIR Public Format bitmap | 3 | |
| FPF | HxC Floppy Emulator Floppy Profile (generic) | 6 | |
| FPF | HxC Floppy Emulator Floppy Profile (v0.1) | 3 | |
| FPF | IKEA Kitchen Planner Document | 18 | |
| FPG | DIV Games Studio Graphics Library | 59 | |
| FPH | Fisher and Paykel Icon Data Format | 6 | |
| FPK | Bleach game data archive | 2 | |
| FPK | PerFORM Communicator File Packet | 6 | |
| FPL | FreePCB Library | 51 | |
| FPL | foobar2000 playlist | 5 | |
| FPPX | Fresh Paint Painting | 14 | |
| FPR | Fiasco Print Report definitions | 4 | Ruggero Furlanetto |
| FPR | Frodo Preferences | 9 | |
| FPR | FruityLoops Humanize Preset | 27 | |
| FPRG | Flowgorithm Program | 9 | |
| FPS | GemDemo benchmarks results | 13 | |
| FPT | Farandole Composer pattern | 5 | |
| FPT | Sybase iAnywhere memo files | 47 | Knuth Konrad |
| FPX | FormWorx for Windows Form (v2.x) | 502 | |
| FPX | Kodak FlashPix bitmap | 459 | |
| FR | Finalburn Alpha movie capture | 2 | |
| FR3 | FastReport 3 report | 25 | |
| FRA | Fractint saved bitmap | 12 | |
| FRB | FrontRunner Binary module | 17 | |
| FRC | Starlancer Force data | 26 | |
| FREC | Fiasco Frequencies | 28 | Ruggero Furlanetto |
| FRED | Fred Editor module | 56 | |
| FREF | Freenet node Reference | 15 | |
| FREF | Freenet node Reference (var.2) | 7 | |
| FRESHROUTE | Navigon Fresh route data | 6 | |
| FRF/FRL/FRP | PerFORM compressed database | 4 | |
| FRG | Sound Forge project | 4 | |
| FRINIKA | Frinika project | 2 | |
| FRL/FRP | FormFlow Form (v1.x) | 13 | |
| FRL/FRP/FRZ | FormFlow Form (v2.x) | 33 | |
| FRL | PerFROM Pro Form | 5 | |
| FRM | ACT! document (v2.0) | 8 | |
| FRM | ADLForms document | 2 | |
| FRM | Corum VIP Form | 21 | |
| FRM | FireFly SDK Designer form | 26 | |
| FRM | Form Master Form (v4.0) | 13 | |
| FRM | Formatting data for Lotus 1-2-3 worksheet | 0 | Joerg Jenderek |
| FRM | Formula document (v1.0) | 7 | |
| FRM | MySQL Database 3.23.52 Dictionary File | 89 | Roberto 'rbnet' Bolli |
| FRM | MySQL Dictionary File (ISAM) | 3 | Vincent van der Tuin |
| FRM | MySQL table Format (generic) | 38 | |
| FRM | MySQL table Format (v10) | 32 | |
| FRM | MySQL table Format (v9) | 6 | |
| FRM | Organize! Form | 13 | |
| FRM | PPrint stencil Format | 7 | |
| FRM | Perfect Forms Form (v1.0) | 102 | |
| FRM | Perfect Forms Form (v3.0) | 107 | |
| FRM | Phoenix Visual Designer form | 19 | |
| FRM | StarWriter for MS-DOS Formula | 4 | |
| FRM | Text602 Form | 3 | |
| FRM | Twist Form (with relations) | 6 | |
| FRM | VBDOS 1.0 Form | 42 | |
| FRM | Visual Basic Form (v1.x) | 23 | |
| FRM | Visual Basic Form (v2.x) | 7 | |
| FRM | VisualBasic Form (generic) | 27 | |
| FRM | VisualBasic Form (v3.x) | 36 | |
| FRM | VisualBasic Form (v6.0) | 93 | |
| FRM | dBASE IV Form design | 21 | |
| FRO | A-Robots Fighting Robot Object | 94 | |
| FRO | dBASE compiled Form | 5 | |
| FRP | CHAOS Fractal Parameters | 58 | |
| FRQ | FREQ0003 frequency data | 1658 | |
| FRS | Fractal Design Painter Frisket | 2 | |
| FRT | MicroProf FRT profilometry data | 4 | |
| FRX | Microsoft Visual Basic Form | 38 | |
| FS | Final Burn savestate | 7 | |
| FS | ZODB File Storage (2.1) | 15 | |
| FSA | Farscape: The Game Animation data | 2 | |
| FSB | FMOD Sample Bank format (generic) | 8 | |
| FSB | FMOD Sample Bank format (v1) | 2 | |
| FSB | FMOD Sample Bank format (v2) | 2 | |
| FSB | FMOD Sample Bank format (v3) | 2 | |
| FSB | FMOD Sample Bank format (v4) | 2 | |
| FSB | FMOD Sample Bank format (v5) | 2 | |
| FSB | form-Z compiled script | 3 | |
| FSC | FL Studio Score | 12 | |
| FSC | SimCity 3000 Freshness Score | 6 | |
| FSD | COCO/COFE Flowsheet Document | 33 | |
| FSD | Flight Sim Toolkit Shape | 612 | |
| FSEQ | Falcon Sequence | 28 | |
| FSEQ | Falcon Sequence (old) | 2 | |
| FSEQ | Falcon Sequence (v1.0) | 3 | |
| FSEQ | Falcon Sequence (v2.0) | 24 | |
| FSEQ | Falcon Sequence (v2.1) | 3 | |
| FSF | Quartus Software Build Settings File | 7 | |
| FSG | Kingsoft Antivirus data | 10 | |
| FSH | Electronic Arts graphics | 15 | |
| FSH | The Need For Speed graphics | 21 | |
| FSL | FORScan Live Streaming Log | 3 | |
| FSLCKOUT | Fossil checkout data base | 1 | Joerg Jenderek |
| FSM | Farandole Composer sample | 5 | |
| FSM | FlexSim Model | 8 | |
| FSN | Greeting Card Factory | 9 | |
| FSP | Flash Slideshow Builder project | 7 | |
| FSPROJ | Visual Studio F# Project | 11 | Ryan Jones |
| FSS | Frodo SnapShot | 3 | |
| FSS | PaperPort slide show | 2 | |
| FST | FASA Interactive game data archive | 2 | |
| FST | FAST input | 37 | |
| FST | FL Studio State | 12 | |
| FST | FutureVision FST video | 2 | |
| FSTF | Flexible Stream Transport Format | 5 | |
| FSU | Es.pectrum snapshot | 3 | |
| FSY | FileSync profile | 5 | |
| FT | HMZK Font | 2 | |
| FT2 | LEGO Games data | 2 | |
| FT2 | S2 Engine Font definition | 5 | |
| FTC | FluxTime Clip | 4 | |
| FTC | Spectrum Fast Tracker chiptune | 40 | |
| FTD | Flight Sim Toolkit Terrain Data | 110 | |
| FTEX | Fox Engine Texture | 9 | |
| FTF | Sony FlashTool Firmware | 11 | |
| FTG | Dark Reign game data archive | 10 | |
| FTG | Windows Help Full-Text search Group | 1 | Joerg Jenderek |
| FTI | FamiTracker Instrument | 12 | |
| FTI | File-Type Image | 22 | |
| FTL | Family Tree Legends data | 4 | |
| FTL | Faster Than Light mod | 6 | |
| FTM | Face The Music module | 108 | |
| FTM | FamiTracker Module | 28 | |
| FTR | File-Type Rule | 11 | |
| FTR | Mortal Kombat 3 game data archive | 4 | |
| FTR | WinPharoah Filter | 2 | |
| FTS | Windows Help Full-Text Search index | 26 | |
| FTW | Family Tree Maker Family Tree | 10 | |
| FTXT | Cloanto C1-Text document | 3 | |
| FTXT | IFF-Text document (generic) | 6 | |
| FUAF | Free Universal Image Format bitmap (multiple frames) | 2 | |
| FUCHS/FT | Fuchs Tracker module | 6 | |
| FUI | Furnace Instrument (new) | 3 | |
| FUI | Furnace Instrument (old) | 250 | |
| FUIF | Free Universal Image Format bitmap | 2 | |
| FUN | Cubify Invent model | 31 | |
| FUN | Funny Paint bitmap | 4 | |
| FUNC | Plotter3D Function | 42 | |
| FUP | FairUse Wizard project | 2 | |
| FUR | Furnace module (uncompressed) | 12 | |
| FUS | Fxpansion Uninstall Script | 2 | |
| FUZ | Bethesda Softworks FUZE voice | 279 | |
| FUZZAC/FUZZ/FUZ | Fuzzac Packer module | 3 | |
| FV2 | Fox Engine Form Variation | 3 | |
| FVD | Fast Virtual Disk image | 8 | |
| FVE | BitLocker Disk Encryption volume | 2 | |
| FVF | Fluke View data | 5 | |
| FVF | STNG 'A Final Unity' Fullmotion Video cutscene File | 27 | |
| FVT | Fast Search and Transfer video | 2 | |
| FW | Forgotten Worlds custom music format | 6 | |
| FW | Intel CPU Microcode | 94 | Joerg Jenderek |
| FW | Kodak Camera Firmware | 2 | |
| FW2 | Framework II document | 6 | |
| FWK | Colton Software Fireworkz document | 1 | |
| FWT | Facil NC Text document (Win) | 30 | |
| FWT | The Office Publisher Font (v1.x) | 29 | |
| FX | Age of Wonders: Shadow Magic Effects | 232 | Kristopher Neidecker |
| FX | BluffTitler Effect | 71 | Ryan Jones |
| FX0 | WipEout sound effects (DOS) | 8 | |
| FXA | The Saboteur Face Animations | 2 | |
| FXB | HALion Sampler patch - bank | 9 | |
| FXCFG | Elite Dangerous graphics Configuration | 8 | |
| FXCOP | FxCop project | 25 | |
| FXCPROJ | FX Composer Project | 7 | |
| FXE | GP32 Free eXecutable Encrypted | 12 | |
| FXG | FXG bitmap | 3 | |
| FXG | Flash XML Graphics | 14 | |
| FXI | Casio Calculator Interface Format Data (v2) | 191 | |
| FXI | Casio Calculator Interface Format Data (v3) | 4 | |
| FXM | Font FX Material | 26 | |
| FXM | Fuxoft AY Language module | 65 | |
| FXM | WinFax Pro multipage document | 145 | Kenneth Pierce |
| FXO | DirectX pre-compiled pixel/vertex shader | 3 | voodooattack |
| FXP | Font FX Path | 29 | |
| FXP | Steinberg Plug-in | 294 | |
| FXR | WinFax Sent / Received document | 132 | |
| FXS | OpenVSP v1 Cross Section | 2 | |
| FXT | Grand Theft Auto Fake Text | 4 | |
| FXT | Lightworks Effect Template | 308 | |
| FZ | Flexible Image Transport System bitmap (compressed) | 32 | |
| FZ | Fritzing sketch | 84 | |
| FZ2 | JB BAHN vehicle (Zoom2) | 2 | |
| FZ4 | JB BAHN vehicle (Zoom4) | 2 | |
| FZA | Fattz Announcement | 2 | Mario "ViRtuAl FoX" Leone |
| FZB | Fritzing Bin module | 25 | |
| FZBZ | Fritzing Bundled Bin | 6 | |
| FZIP | Foxit Reader Add-on | 8 | |
| FZP | Fritzing Part | 60 | |
| FZPZ | Fritzing Bundled Part | 261 | |
| FZZ | Fritzing shareable project | 81 | |
