| .ECF | Microsoft Corporation | Innstillingsfiler | Outlook Add-in | Microsoft Outlook | Microsoft Corporation |
| .ECU | Open Source | Innstillingsfiler | TunerPro ECU Configurator Data | TunerPro | Open Source |
| .EDL | Avid Technology | Innstillingsfiler | Edit Decision List File | Adobe Premiere Pro CC | Adobe Systems Incorporated |
| .EDR | BALARAD | Innstillingsfiler | Embird Color Palette | Embroidermodder 2 | Open Source |
| .EFC | Unknown Developer | Innstillingsfiler | EFCoins File | Unknown Software | Unknown Developer |
| .EFT | Cay Horstmann | Innstillingsfiler | ChiWriter High Resolution Screen Font | ChiWriter | Cay Horstmann |
| .EHI | Evozi | Innstillingsfiler | HTTP Injector Config File | HTTP Injector | Evozi |
| .ELE | Zemax | Innstillingsfiler | ZEMAX Element Drawing Settings | ZEMAX | Zemax |
| .ELM | Open Source | Innstillingsfiler | Eternal Lands Map File | Eternal Lands | Open Source |
| .EMM | MindMaple Inc. | Innstillingsfiler | MindMaple Map | MindMaple | MindMaple Inc. |
| .ENC | Smith Micro Software | Innstillingsfiler | Encoded Data File | Smith Micro StuffIt Deluxe | Smith Micro Software |
| .END | Corel | Innstillingsfiler | CorelDRAW Arrow-head Definition Data | CorelDRAW Graphics Suite | Corel |
| .ENP | Thomson Reuters Corporation | Innstillingsfiler | EndNote Preferences File | EndNote | Thomson Reuters Corporation |
| .ENS | Thomson Reuters Corporation | Innstillingsfiler | EndNote Style File | EndNote | Thomson Reuters Corporation |
| .ENV | Adobe Systems Incorporated | Innstillingsfiler | Adobe Dictionary Data File | Adobe Illustrator CC | Adobe Systems Incorporated |
| .ENZ | Thomson Reuters Corporation | Innstillingsfiler | EndNote Connection File | Thomson Reuters EndNote | Clarivate Analytics |
| .EPR | Adobe Systems Incorporated | Innstillingsfiler | Photoshop AME Preset File | Adobe Photoshop CC | Adobe Systems Incorporated |
| .EPRO | Open Source | Innstillingsfiler | eProxy For Android Configuration File | eProxy for Android | Open Source |
| .EQF | Nullsoft | Innstillingsfiler | Winamp Equalizer Preset File | Nullsoft Winamp | Nullsoft |
| .EQL | Design Science | Innstillingsfiler | MathType Settings | Design Science MathType | Design Science |
| .EQP | Design Science | Innstillingsfiler | MathType Preferences | MathType | Design Science |
| .ESI | Open Source | Innstillingsfiler | Escape Level Index File | Escape | Open Source |
| .ETFF | Encrypt4all Software | Innstillingsfiler | Encrypt4all Theme File | Encrypt4all | Encrypt4all Software |
| .EUM | WaveRider Communications Inc. | Innstillingsfiler | Enterprise User Monitor Configuration File | WaveRider EUM Configuration Utility | WaveRider Communications Inc. |
| .EV3 | The LEGO Group | Innstillingsfiler | LEGO MINDSTORMS EV3 Project | LEGO MINDSTORMS EV3 | The LEGO Group |
| .EVP | Miracle Castle | Innstillingsfiler | Talisman Online Game Data | Talisman Online | Miracle Castle |
| .EWPRJ | National Instruments | Innstillingsfiler | Ultiboard Layout Project | Circuit Design Suite | National Instruments |
| .EX | Symantec Corporation | Innstillingsfiler | Norton Ghost Template Data | Symantec Ghost Solution Suite | Symantec Corporation |
| .EXA | Aquila Software | Innstillingsfiler | Examine32 Saved Search Paramaters File | Examine32 | Aquila Software |
| .EXAMPLE | Open Source | Innstillingsfiler | Example Configuration File | Notepad++ | Don Ho |
| .EXP | Unknown Developer | Innstillingsfiler | Symbols Export File | Microsoft Visual Studio | Microsoft Corporation |
| .EXT | Symantec Corporation | Innstillingsfiler | Norton Commander Extension | Norton Commander | Symantec Corporation |
| .EZHEX | Logitech | Innstillingsfiler | Logitech Harmony Configuration File | Harmony Advanced Universal Remote | Logitech |
| .FAM | Electronic Arts | Innstillingsfiler | The Sims Family Data Game File | The Sims | Electronic Arts |
| .FAN | AutoDesSys, Inc. | Innstillingsfiler | Form•Z Animation File | AutoDesSys formZ | AutoDesSys, Inc. |
| .FAP | ACD Systems | Innstillingsfiler | ACD FotoAngelo Project | ACD FotoAngelo | ACD Systems |
| .FAT | Open Source | Innstillingsfiler | Zinf Theme File | Zinf Audio Player | Open Source |
| .FAV | Microsoft Corporation | Innstillingsfiler | Microsoft Outlook Bar-Shortcut | Microsoft Outlook | Microsoft Corporation |
| .FC | OpenText | Innstillingsfiler | FirstClass Settings File | OpenText FirstClass | OpenText |
| .FCC | Netegrity | Innstillingsfiler | Forms Credential Collector File | Netegrity SiteMinder | IBM |
| .FCM | fcraft.net | Innstillingsfiler | fCraft World File | fCraft | fcraft.net |
| .FD | Data Access Worldwide | Innstillingsfiler | DataFlex Data File | DataFlex | Data Access Worldwide |
| .FDC | Autodesk, Inc. | Innstillingsfiler | AutoCAD Field Catalog File | Autodesk AutoCAD | Autodesk, Inc. |
| .FEQ | Open Source | Innstillingsfiler | SuperEQ Equalizer Settings | Foobar2000 | Piotr Pawlowski |
| .FEV | Firelight Technologies | Innstillingsfiler | FMOD Audio Events File | Firelight Technologies FMOD Designer | Firelight Technologies |
| .FFX | Adobe Systems Incorporated | Innstillingsfiler | After Effects Preset File | Adobe After Effects | Adobe Systems Incorporated |
| .FGA | WinAbility Software | Innstillingsfiler | Folder Guard Attributes | Folder Guard | WinAbility Software |
| .FGM | Autodesk, Inc. | Innstillingsfiler | 3ds Max Final Gather Map File | Autodesk 3ds Max | Autodesk, Inc. |
| .FHX | Emerson | Innstillingsfiler | DeltaV Configuration | DeltaV | Emerson |
| .FI | Microsoft Corporation | Innstillingsfiler | Fortran Interface Data | Fortran | IBM |
| .FIG | Open Source | Innstillingsfiler | Xfig Drawing | Winfig | Andreas Schmidt |
| .FIN | Interscape | Innstillingsfiler | Sapir Torah Text | Sapir Torah | Interscape |
| .FIO | Adobe Systems Incorporated | Innstillingsfiler | PhotoStyler Graphics Filter | Aldus PhotoStyler | Adobe Systems Incorporated |
| .FIV | Forensic Innovations | Innstillingsfiler | File Investigator Database | File Investigator | Forensic Innovations |
| .FLD | Open Source | Innstillingsfiler | YSFLIGHT Field File | YSFlight | Open Source |
| .FLE | Unknown Developer | Innstillingsfiler | Scanner Settings File | Unknown Software | Unknown Developer |
| .FLT | Presagis | Innstillingsfiler | OpenFlight Scene Description File | ESRI ArcGIS for Desktop | ESRI (Environmental Systems Research Institute) |
| .FLX | Autodesk, Inc. | Innstillingsfiler | FLIC Animation | Apple QuickTime Player | Apple |
| .FM3 | IBM | Innstillingsfiler | Lotus 1-2-3 Spreadsheet Format File | Microsoft Excel | Microsoft Corporation |
| .FMB | Oracle Corporation | Innstillingsfiler | Oracle Forms Binary Source Code | Oracle Forms | Oracle Corporation |
| .FMP | Dreamingsoft | Innstillingsfiler | 123 Flash Menu Project | 123 Flash Menu | Dreamingsoft |
| .FMS | Mark Finney | Innstillingsfiler | FARSITE Initial Fuel Moistures File | FARSITE | Mark Finney |
| .FMT | Microsoft Corporation | Innstillingsfiler | FoxPro Format File | Microsoft Visual FoxPro | Microsoft Corporation |
| .FNC | E-on Software, Inc. | Innstillingsfiler | Vue Functions File | E-on Vue | E-on Software, Inc. |
| .FNP | IBM | Innstillingsfiler | IBM FileNet IDM Desktop Settings File | IBM FileNet | IBM |
| .FOL | SoftKey | Innstillingsfiler | PFS First Choice Database File | SoftKey PFS First Choice | SoftKey |
| .FORM | Oracle Corporation | Innstillingsfiler | NetBeans Java GUI Designer Form | NetBeans | Open Source |
| .FPL | Piotr Pawlowski | Innstillingsfiler | Foobar2000 Playlist File | Foobar2000 | Piotr Pawlowski |
| .FPT | Sage | Innstillingsfiler | ACT! Data File | Act! | Swiftpage, Inc. |
| .FPW | Microsoft Corporation | Innstillingsfiler | FoxPro Configuration | Microsoft Visual FoxPro | Microsoft Corporation |
| .FRAMES | Iconfactory | Innstillingsfiler | xScope Frames File | The Iconfactory xScope 4 | Iconfactory |
| .FRC | Dovetail Games | Innstillingsfiler | FS Recorder File | FS Recorder | Unknown Developer |
| .FSI | Microsoft Corporation | Innstillingsfiler | Visual F# Signature File | Microsoft Visual Studio | Microsoft Corporation |
| .FSK | Atari Corporation | Innstillingsfiler | Atari 8-bit Cassette Image | A8CAS | SourceForge |
| .FSS | Basta Computing | Innstillingsfiler | Splitty Data Split File | Basta Computing Splitty | Basta Computing |
| .FST | Image-Line | Innstillingsfiler | FL Studio State File | Image-Line FL Studio | Image-Line |
| .FTP | SolarWinds Inc. | Innstillingsfiler | FTP Configuration Data | FlashFXP | OpenSight Software, LLC. |
| .FUS | FXpansion Audio UK Ltd. | Innstillingsfiler | GURU Uninstall Script | GURU | FXpansion Audio UK Ltd. |
| .FVP | Unknown Developer | Innstillingsfiler | File Viewer Plus Batch Presets File | Unknown Software | Unknown Developer |
| .FWT | FacetCorp | Innstillingsfiler | FacetWin Configuration File | FacetWin | FacetCorp |
| .FXB | Steinberg | Innstillingsfiler | FX Bank File | Steinberg Cubase | Steinberg |
| .FXP | Microsoft Corporation | Innstillingsfiler | FoxPro Compiled Program | Microsoft Visual FoxPro | Microsoft Corporation |
| .G16 | SourceForge | Innstillingsfiler | GoldED Configuration File | GoldED | SourceForge |
| .GAP | Ulead Systems | Innstillingsfiler | PhotoImpact Pencil Style Data | PhotoImpact | Corel |
| .GCO | Thoughtful Creations | Innstillingsfiler | Genbox Family History Chart Options File | Genbox Family History | Thoughtful Creations |
| .GCSX | Microsoft Corporation | Innstillingsfiler | Microsoft Office SmartArt Color File | Microsoft Office | Microsoft Corporation |
| .GDF | Eytan Adar | Innstillingsfiler | GUESS Graph Data Format File | GUESS | Eytan Adar |
| .GDT | Open Source | Innstillingsfiler | Gretl Data File | gretl | Open Source |
| .GE | PhonicBloom Limited | Innstillingsfiler | Gecho Configuration File | Gecho Loopsynth | PhonicBloom Limited |
| .GEPRINT | Google | Innstillingsfiler | Google Earth Pro Map Settings | Google Earth | Google |
| .GHI | Unknown Developer | Innstillingsfiler | NCSA Mosaic Configuration File | Unknown Software | Unknown Developer |
| .GMW | Blue Marble Geographics | Innstillingsfiler | Global Mapper Workspace | Global Mapper | Blue Marble Geographics |
| .GPS | Molecular Devices | Innstillingsfiler | GenePix Settings File | GenePix Pro Software | Molecular Devices |
| .GQSX | Microsoft Corporation | Innstillingsfiler | Microsoft Office SmartArt Styles File | Microsoft Office | Microsoft Corporation |
| .GRD | Adobe Systems Incorporated | Innstillingsfiler | Photoshop Gradient File | Adobe Photoshop | Adobe Systems Incorporated |
| .GRID | João Paiva | Innstillingsfiler | GridMove Grid Settings | GridMove | João Paiva |
| .GRO | Open Source | Innstillingsfiler | Allegro MIDI File | Audacity | Open Source |
| .GRS | Headlight Software | Innstillingsfiler | GetRight Skin | GetRight | Headlight Software |
| .GRU | FXpansion Audio UK Ltd. | Innstillingsfiler | Geist Preset Data | Geist | FXpansion Audio UK Ltd. |
| .GTP | Ucamco | Innstillingsfiler | Gerber Top Solder Paste Data File | CadSoft EAGLE | Autodesk, Inc. |
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