| .123 | IBM | Regnearksfiler | Lotus 1-2-3 Spreadsheet | Apache OpenOffice | Apache Software Foundation |
| .APT | Apache Software Foundation | Tekstfiler | Almost Plain Text File | Apache OpenOffice | Apache Software Foundation |
| .BAU | Sun Microsystems | Indstillingsfiler | Apache OpenOffice AutoText File | Apache OpenOffice | Apache Software Foundation |
| .BIN | Unknown Developer | Disk billedfiler | Binary Disk Image File | Apache OpenOffice | Apache Software Foundation |
| .CF | Proofpoint, Inc. | Indstillingsfiler | Sendmail Configuration File | Apache OpenOffice | Apache Software Foundation |
| .CSV | Unknown Developer | Datafiler | Comma Separated Values File | Apache OpenOffice | Apache Software Foundation |
| .CVS | Unknown Developer | Datafiler | Comma Separated Values File | Apache OpenOffice | Apache Software Foundation |
| .DB | Dwayne Richard Hipp | Databasefiler | Mobile Device Database File | Apache OpenOffice | Apache Software Foundation |
| .DBF | dBase, LLC | Databasefiler | Database File | Apache OpenOffice | Apache Software Foundation |
| .DIF | Microsoft Corporation | Datafiler | Data Interchange Format | Apache OpenOffice | Apache Software Foundation |
| .DOC | Microsoft Corporation | Tekstfiler | Microsoft Word Document (before The 2007 Version) | Apache OpenOffice | Apache Software Foundation |
| .DOCM | Microsoft Corporation | Tekstfiler | Word Open XML Macro-Enabled Document | Apache OpenOffice | Apache Software Foundation |
| .DON | Apache Software Foundation | Datafiler | Apache OpenOffice (OpenOffice.org) Log | Apache OpenOffice | Apache Software Foundation |
| .DOT | Microsoft Corporation | Sideopsætningsfiler | Word Document Template | Apache OpenOffice | Apache Software Foundation |
| .DOTM | Microsoft Corporation | Sideopsætningsfiler | Word 2007 XML Macro-Enabled Template | Apache OpenOffice | Apache Software Foundation |
| .DOTX | Microsoft Corporation | Sideopsætningsfiler | Word 2007 XML Template | Apache OpenOffice | Apache Software Foundation |
| .DPC | Microsoft Corporation | Datafiler | Microsoft Office Resource File | Apache OpenOffice | Apache Software Foundation |
| .DUMP | Microsoft Corporation | Systemfiler | Dump File | Apache OpenOffice | Apache Software Foundation |
| .EMF | Microsoft Corporation | Vektorbilledfiler | Enhanced Windows Metafile | Apache OpenOffice | Apache Software Foundation |
| .HWP | Hancom, Inc. | Tekstfiler | Hanword Document | Apache OpenOffice | Apache Software Foundation |
| .JNLP | Oracle Corporation | Webfiler | Java Web Start File | Apache OpenOffice | Apache Software Foundation |
| .MAB | Mozilla | Ikke Almindelige Filer | Mozilla Address Book | Apache OpenOffice | Apache Software Foundation |
| .MET | Emulex Corporation | Datafiler | eMule Resource File | Apache OpenOffice | Apache Software Foundation |
| .ODB | Various Developers | Databasefiler | OpenDocument Database | Apache OpenOffice | Apache Software Foundation |
| .ODC | Microsoft Corporation | Indstillingsfiler | Office Data Connection File | Apache OpenOffice | Apache Software Foundation |
| .ODCCUBEFILE | Apache Software Foundation | Ikke Almindelige Filer | OpenDocument 1 Chart | Apache OpenOffice | Apache Software Foundation |
| .ODF | Oracle Corporation | Ikke Almindelige Filer | OpenDocument Formula | Apache OpenOffice | Apache Software Foundation |
| .ODG | Apache Software Foundation | Vektorbilledfiler | OpenDocument Graphic File | Apache OpenOffice | Apache Software Foundation |
| .ODI | Apache Software Foundation | Rasterbilledfiler | OpenDocument Image | Apache OpenOffice | Apache Software Foundation |
| .ODM | Open Source | Tekstfiler | OpenDocument Master Document | Apache OpenOffice | Apache Software Foundation |
| .ODP | Oracle Corporation | Datafiler | OpenDocument Presentation | Apache OpenOffice | Apache Software Foundation |
| .ODT | Oracle Corporation | Tekstfiler | OpenDocument Text Document | Apache OpenOffice | Apache Software Foundation |
| .OOT | Apache HTTP Project Management Committee | Datafiler | Apache OpenOffice Text Document | Apache OpenOffice | Apache Software Foundation |
| .OTC | Apache Software Foundation | Ikke Almindelige Filer | OpenDocument Chart Template | Apache OpenOffice | Apache Software Foundation |
| .OTG | Apache Software Foundation | Vektorbilledfiler | OpenDocument Graphic Template | Apache OpenOffice | Apache Software Foundation |
| .OTH | Apache Software Foundation | Webfiler | OpenDocument HTML Template | Apache OpenOffice | Apache Software Foundation |
| .OTI | Apache Software Foundation | Rasterbilledfiler | OpenDocument Image Template | Apache OpenOffice | Apache Software Foundation |
| .OTP | Oracle Corporation | Datafiler | OpenDocument Presentation | Apache OpenOffice | Apache Software Foundation |
| .OTS | Apache Software Foundation | Regnearksfiler | OpenDocument Spreadsheet Template | Apache OpenOffice | Apache Software Foundation |
| .OTT | Apache Software Foundation | Tekstfiler | OpenDocument Document Template | Apache OpenOffice | Apache Software Foundation |
| .OXT | Sun Microsystems | Plug-in-filer | Apache OpenOffice Extension | Apache OpenOffice | Apache Software Foundation |
| .PAR | Siemens PLM Software | CAD-filer | Solid Edge Part File | Apache OpenOffice | Apache Software Foundation |
| .PBA | Oracle Corporation | Plug-in-filer | OpenOffice.org Basic Protected Module File | Apache OpenOffice | Apache Software Foundation |
| .PCD | PokéCheats | Spilfiler | Pokémon Wonder Card File | Apache OpenOffice | Apache Software Foundation |
| .PMK | David Harris | Indstillingsfiler | Pegasus Mail Keyboard Settings | Apache OpenOffice | Apache Software Foundation |
| .PO | Sublime HQ Pty Ltd | Udviklerfiler | Portable Object | Apache OpenOffice | Apache Software Foundation |
| .POT | Microsoft Corporation | Datafiler | PowerPoint Template | Apache OpenOffice | Apache Software Foundation |
| .PPS | Microsoft Corporation | Datafiler | PowerPoint Slide Show | Apache OpenOffice | Apache Software Foundation |
| .PPSX | Microsoft Corporation | Datafiler | PowerPoint Open XML Slide Show | Apache OpenOffice | Apache Software Foundation |
| .PPT | Microsoft Corporation | Datafiler | PowerPoint Presentation | Apache OpenOffice | Apache Software Foundation |
| .PPTX | Microsoft Corporation | Datafiler | PowerPoint Open XML Presentation | Apache OpenOffice | Apache Software Foundation |
| .PSV | Sony | Spilfiler | PlayStation 2 Save File | Apache OpenOffice | Apache Software Foundation |
| .PSW | Microsoft Corporation | Ikke Almindelige Filer | Windows Password Reset Disk File | Apache OpenOffice | Apache Software Foundation |
| .PWI | Microsoft Corporation | Tekstfiler | Pocket Word Document | Apache OpenOffice | Apache Software Foundation |
| .RNG | Nokia | Lydfiler | Nokia Composer Ringtone | Apache OpenOffice | Apache Software Foundation |
| .SBL | Adobe Systems Incorporated | Grafiske Filer | Shockwave Flash Object | Apache OpenOffice | Apache Software Foundation |
| .SDA | Oracle Corporation | Vektorbilledfiler | StarOffice Drawing | Apache OpenOffice | Apache Software Foundation |
| .SDC | Stardock Corporation | Sikkerhedskopifiler | Stardock Central Download Archive | Apache OpenOffice | Apache Software Foundation |
| .SDD | Programming Sunrise | Datafiler | Smart Diary Suite Data File | Apache OpenOffice | Apache Software Foundation |
| .SDI | Intuit, Inc. | Datafiler | QuickBooks Data File | Apache OpenOffice | Apache Software Foundation |
| .SDP | Oracle Corporation | Datafiler | StarOffice Presentation File | Apache OpenOffice | Apache Software Foundation |
| .SDS | Oracle Corporation | Datafiler | OpenOffice.org Chart | Apache OpenOffice | Apache Software Foundation |
| .SDV | Pinnacle Systems Inc. | Videofiler | Studio DV Project File | Apache OpenOffice | Apache Software Foundation |
| .SDW | LizardTech | GIS-filer | MrSID World File | Apache OpenOffice | Apache Software Foundation |
| .SFS | Open Source | Komprimerede filer | Squashfs File Archive | Apache OpenOffice | Apache Software Foundation |
| .SKI | Motorola | Indstillingsfiler | Motorola Phone Skin File | Apache OpenOffice | Apache Software Foundation |
| .SKV | Microsoft Corporation | Datafiler | Semicolon Separated Values File | Apache OpenOffice | Apache Software Foundation |
| .SMF | Oracle Corporation | Tekstfiler | StarMath Formula File | Apache OpenOffice | Apache Software Foundation |
| .SMS | Sega | Spilfiler | Sega Master System ROM | Apache OpenOffice | Apache Software Foundation |
| .SOB | Apache Software Foundation | Rasterbilledfiler | OpenOffice.org Impress Bimap Styles File | Apache OpenOffice | Apache Software Foundation |
| .SOC | Apache Software Foundation | Indstillingsfiler | OpenOffice.org Configuration File | Apache OpenOffice | Apache Software Foundation |
| .SOD | id Software | Spilfiler | Spear Of Destiny Data File | Apache OpenOffice | Apache Software Foundation |
| .SOF | Apache Software Foundation | Datafiler | Colour Palettes And Various Style Elements File | Apache OpenOffice | Apache Software Foundation |
| .SOG | Apache Software Foundation | Datafiler | Apache OpenOffice (OpenOffice.org) Colour Palettes | Apache OpenOffice | Apache Software Foundation |
| .SRS | Microsoft Corporation | Indstillingsfiler | Outlook Send/Receive Settings File | Apache OpenOffice | Apache Software Foundation |
| .STC | Adobe Systems Incorporated | Webfiler | Contribute Connection Key File | Apache OpenOffice | Apache Software Foundation |
| .STD | Oracle Corporation | Vektorbilledfiler | Apache OpenOffice Drawing Template | Apache OpenOffice | Apache Software Foundation |
| .STI | Oracle Corporation | Datafiler | StarOffice Presentation Template | Apache OpenOffice | Apache Software Foundation |
| .STW | Oracle Corporation | Tekstfiler | StarOffice Document Template | Apache OpenOffice | Apache Software Foundation |
| .SVM | Star Division | Rasterbilledfiler | StarView Metafile | Apache OpenOffice | Apache Software Foundation |
| .SWX | Apache Software Foundation | Tekstfiler | OpenOffice.org 1.0 Text Document | Apache OpenOffice | Apache Software Foundation |
| .SXD | ESRI | GIS-filer | ArcScene Document | Apache OpenOffice | Apache Software Foundation |
| .SXG | Oracle Corporation | Tekstfiler | Apache OpenOffice Master Document | Apache OpenOffice | Apache Software Foundation |
| .SXI | Oracle Corporation | Datafiler | StarOffice Impress Presentation | Apache OpenOffice | Apache Software Foundation |
| .SXW | Oracle Corporation | Tekstfiler | StarOffice Writer Document | Apache OpenOffice | Apache Software Foundation |
| .THM | Sony | Ikke Almindelige Filer | Sony Ericsson Mobile Phone Theme File | Apache OpenOffice | Apache Software Foundation |
| .TSV | Unknown Developer | Datafiler | Tab Separated Values File | Apache OpenOffice | Apache Software Foundation |
| .UOF | The Document Foundation | Tekstfiler | Uniform Office Document | Apache OpenOffice | Apache Software Foundation |
| .URD | Kinook Software, Inc. | Databasefiler | Ultra Recall Database File | Apache OpenOffice | Apache Software Foundation |
| .VOR | Sun Microsystems | Ikke Almindelige Filer | StarOffice Template | Apache OpenOffice | Apache Software Foundation |
| .VSDX | Microsoft Corporation | Vektorbilledfiler | Visio Drawing | Apache OpenOffice | Apache Software Foundation |
| .WK! | IBM | Regnearksfiler | Lotus 1-2-3 Spreadsheet | Apache OpenOffice | Apache Software Foundation |
| .WKE | IBM | Regnearksfiler | Lotus 1-2-3 Educational Version Worksheet | Apache OpenOffice | Apache Software Foundation |
| .WR! | IBM | Regnearksfiler | Lotus 1-2-3 Spreadsheet | Apache OpenOffice | Apache Software Foundation |
| .XBA | Oracle Corporation | Plug-in-filer | OpenOffice.org Basic Module File | Apache OpenOffice | Apache Software Foundation |
| .XCU | Apache Software Foundation | Indstillingsfiler | OpenOffice.org Configuration File | Apache OpenOffice | Apache Software Foundation |
| .XLB | Microsoft Corporation | Indstillingsfiler | Excel Toolbars File | Apache OpenOffice | Apache Software Foundation |
| .XLSB | Microsoft Corporation | Regnearksfiler | Excel Binary Spreadsheet | Apache OpenOffice | Apache Software Foundation |
| .XLSX | Microsoft Corporation | Regnearksfiler | Microsoft Excel Open XML Spreadsheet | Apache OpenOffice | Apache Software Foundation |
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