| .123 | IBM | Spreadsheetdateien | Lotus 1-2-3 Spreadsheet | Apache OpenOffice | Apache Software Foundation |
| .AAR | Apache Software Foundation | Textdateien | Axis Archive | Apache Axis2 | Apache Software Foundation |
| .APT | Apache Software Foundation | Textdateien | Almost Plain Text File | Apache OpenOffice | Apache Software Foundation |
| .ASHX | Microsoft Corporation | Webdateien | ASP.NET Web Handler File | OpenOffice Writer | Apache Software Foundation |
| .ASP | Microsoft Corporation | Webdateien | Active Server Page | OpenOffice Writer | Apache Software Foundation |
| .ATT | Unknown Developer | Webdateien | Web Form Post Data File | OpenOffice Writer | Apache Software Foundation |
| .AXD | Microsoft Corporation | Webdateien | ASP.NET Web Handler File | OpenOffice Writer | Apache Software Foundation |
| .B | Rockstar Games | Spieldateien | Grand Theft Auto 3 Saved Game File | OpenOffice Writer | Apache Software Foundation |
| .BAU | Sun Microsystems | Einstellungsdateien | Apache OpenOffice AutoText File | Apache OpenOffice | Apache Software Foundation |
| .BIN | Unknown Developer | Diskimagedateien | Binary Disk Image File | Apache OpenOffice | Apache Software Foundation |
| .CF | Proofpoint, Inc. | Einstellungsdateien | Sendmail Configuration File | Apache OpenOffice | Apache Software Foundation |
| .CFG | Unknown Developer | Entwicklerdateien | Configuration File | OpenOffice Writer | Apache Software Foundation |
| .CFS | Apache HTTP Project Management Committee | Sonstige Dateien | Lucene Compound Index File | Apache Lucene | Apache Software Foundation |
| .CONFIG | Unknown Developer | Entwicklerdateien | Configuration File | OpenOffice Writer | Apache Software Foundation |
| .CPIO | Power Software Ltd | Verschlüsselte Dateien | Unix CPIO Archive | Apache Commons Compress | Apache Software Foundation |
| .CSV | Unknown Developer | Textdateien | Comma Separated Values File | Apache OpenOffice | Apache Software Foundation |
| .CVS | Unknown Developer | Textdateien | Comma Separated Values File | Apache OpenOffice | Apache Software Foundation |
| .DB | Dwayne Richard Hipp | Datenbankdateien | Mobile Device Database File | Apache OpenOffice | Apache Software Foundation |
| .DBF | dBase, LLC | Datenbankdateien | Database File | Apache OpenOffice | Apache Software Foundation |
| .DIF | Microsoft Corporation | Textdateien | Data Interchange Format | Apache OpenOffice | Apache Software Foundation |
| .DIZ | Unknown Developer | Textdateien | Description In Zip File | OpenOffice Writer | Apache Software Foundation |
| .DO | Unknown Developer | Webdateien | Java Servlet | Apache Tomcat | Apache Software Foundation |
| .DOC | Microsoft Corporation | Textdateien | Microsoft Word Document (before The 2007 Version) | Apache OpenOffice | Apache Software Foundation |
| .DOCM | Microsoft Corporation | Textdateien | Word Open XML Macro-Enabled Document | Apache OpenOffice | Apache Software Foundation |
| .DOCX | Microsoft Corporation | Textdateien | Microsoft Word Open XML Document | OpenOffice Writer | Apache Software Foundation |
| .DON | Apache Software Foundation | Textdateien | Apache OpenOffice (OpenOffice.org) Log | Apache OpenOffice | Apache Software Foundation |
| .DOT | Microsoft Corporation | Seitenlayoutdateien | Word Document Template | Apache OpenOffice | Apache Software Foundation |
| .DOTM | Microsoft Corporation | Seitenlayoutdateien | Word 2007 XML Macro-Enabled Template | Apache OpenOffice | Apache Software Foundation |
| .DOTX | Microsoft Corporation | Seitenlayoutdateien | Word 2007 XML Template | Apache OpenOffice | Apache Software Foundation |
| .DPC | Microsoft Corporation | Textdateien | Microsoft Office Resource File | Apache OpenOffice | Apache Software Foundation |
| .DUMP | Microsoft Corporation | Systemdateien | Dump File | Apache OpenOffice | Apache Software Foundation |
| .EAR | Oracle Corporation | Ausführbare Dateien | Java Enterprise Archive File | Apache Geronimo | Apache Software Foundation |
| .EMF | Microsoft Corporation | Vektorbilddateien | Enhanced Windows Metafile | Apache OpenOffice | Apache Software Foundation |
| .FAQ | The Document Foundation | 3D-Dateien | Frequently Asked Questions Document | OpenOffice Writer | Apache Software Foundation |
| .FDT | Final Draft | Textdateien | Final Draft 5-7 Template | Apache Lucene | Apache Software Foundation |
| .FPR | Hewlett-Packard | Textdateien | Audit Workbench Project | OpenOffice Writer | Apache Software Foundation |
| .FRQ | Open Source | Textdateien | Bibexcel File | Apache Lucene | Apache Software Foundation |
| .FTL | Apache Software Foundation | Entwicklerdateien | FreeMarker Template File | FreeMaker | Apache Software Foundation |
| .GFW | Open Source | GIS-Dateien | GIF World File | OpenOffice Writer | Apache Software Foundation |
| .HRL | Ericsson Computer Science Laboratory | Entwicklerdateien | Erlang Header File | OpenOffice Writer | Apache Software Foundation |
| .HTACCESS | Apache Software Foundation | Webdateien | Apache HTACCESS File | Apache HTTP Server | Apache Software Foundation |
| .HWP | Hancom, Inc. | Textdateien | Hanword Document | Apache OpenOffice | Apache Software Foundation |
| .ICF | Zoom Telephonics | Backupdateien | Zoom Router Configuration File | OpenOffice Writer | Apache Software Foundation |
| .JNLP | Oracle Corporation | Webdateien | Java Web Start File | Apache OpenOffice | Apache Software Foundation |
| .JS | NetScape | Webdateien | JavaScript File | OpenOffice Writer | Apache Software Foundation |
| .JSCRIPT | NetScape | Webdateien | JavaScript File | OpenOffice Writer | Apache Software Foundation |
| .JSW | JustSystems | Textdateien | Ichitaro 4.0 Document | Apache Tomcat | Apache Software Foundation |
| .JTL | Apache Software Foundation | Textdateien | JMeter Test Results Data File | Apache JMeter | Apache Software Foundation |
| .LDI | Trudi Ersvaer (co-developer) | Textdateien | LDIF File | Apache Directory Server/Studio | Apache Software Foundation |
| .LST | Unknown Developer | Textdateien | Data List | OpenOffice Writer | Apache Software Foundation |
| .LYT | Adminsoft | Textdateien | Adminsoft Document Layout File | OpenOffice Writer | Apache Software Foundation |
| .MAB | Mozilla | Sonstige Dateien | Mozilla Address Book | Apache OpenOffice | Apache Software Foundation |
| .ME | Unknown Developer | Sonstige Dateien | Temporary Delete Me File | OpenOffice Writer | Apache Software Foundation |
| .MET | Emulex Corporation | Textdateien | eMule Resource File | Apache OpenOffice | Apache Software Foundation |
| .NFO | Microsoft Corporation | Systemdateien | System Information File | OpenOffice Writer | Apache Software Foundation |
| .NOW | The Document Foundation | Textdateien | Readme Text Document File | OpenOffice Writer | Apache Software Foundation |
| .OBR | Micro Focus International plc | Entwicklerdateien | Borland C++ Object Browser Data | Apache Tomcat | Apache Software Foundation |
| .ODB | Various Developers | Datenbankdateien | OpenDocument Database | Apache OpenOffice | Apache Software Foundation |
| .ODC | Microsoft Corporation | Einstellungsdateien | Office Data Connection File | Apache OpenOffice | Apache Software Foundation |
| .ODCCUBEFILE | Apache Software Foundation | Sonstige Dateien | OpenDocument 1 Chart | Apache OpenOffice | Apache Software Foundation |
| .ODF | Oracle Corporation | Sonstige Dateien | OpenDocument Formula | Apache OpenOffice | Apache Software Foundation |
| .ODG | Apache Software Foundation | Vektorbilddateien | OpenDocument Graphic File | Apache OpenOffice | Apache Software Foundation |
| .ODI | Apache Software Foundation | Rasterbilddateien | OpenDocument Image | Apache OpenOffice | Apache Software Foundation |
| .ODM | Open Source | Textdateien | OpenDocument Master Document | Apache OpenOffice | Apache Software Foundation |
| .ODP | Oracle Corporation | Textdateien | OpenDocument Presentation | Apache OpenOffice | Apache Software Foundation |
| .ODS | Oracle Corporation | Spreadsheetdateien | OpenDocument Spreadsheet | Apache OpenOffice Calc | Apache Software Foundation |
| .ODT | Oracle Corporation | Textdateien | OpenDocument Text Document | Apache OpenOffice | Apache Software Foundation |
| .OOS | Apache Software Foundation | Spreadsheetdateien | Apache OpenOffice (OpenOffice.org) Spreadsheet | Apache OpenOffice Calc | Apache Software Foundation |
| .OOT | Apache HTTP Project Management Committee | Textdateien | Apache OpenOffice Text Document | Apache OpenOffice | Apache Software Foundation |
| .OTC | Apache Software Foundation | Sonstige Dateien | OpenDocument Chart Template | Apache OpenOffice | Apache Software Foundation |
| .OTG | Apache Software Foundation | Vektorbilddateien | OpenDocument Graphic Template | Apache OpenOffice | Apache Software Foundation |
| .OTH | Apache Software Foundation | Webdateien | OpenDocument HTML Template | Apache OpenOffice | Apache Software Foundation |
| .OTI | Apache Software Foundation | Rasterbilddateien | OpenDocument Image Template | Apache OpenOffice | Apache Software Foundation |
| .OTP | Oracle Corporation | Textdateien | OpenDocument Presentation | Apache OpenOffice | Apache Software Foundation |
| .OTS | Apache Software Foundation | Spreadsheetdateien | OpenDocument Spreadsheet Template | Apache OpenOffice | Apache Software Foundation |
| .OTT | Apache Software Foundation | Textdateien | OpenDocument Document Template | Apache OpenOffice | Apache Software Foundation |
| .OXT | Sun Microsystems | Plugindateien | Apache OpenOffice Extension | Apache OpenOffice | Apache Software Foundation |
| .PAR | Siemens PLM Software | CAD-Dateien | Solid Edge Part File | Apache OpenOffice | Apache Software Foundation |
| .PBA | Oracle Corporation | Plugindateien | OpenOffice.org Basic Protected Module File | Apache OpenOffice | Apache Software Foundation |
| .PCD | PokéCheats | Spieldateien | Pokémon Wonder Card File | Apache OpenOffice | Apache Software Foundation |
| .PHTML | Opera Software | Webdateien | PHP Web Page | Apache Tomcat | Apache Software Foundation |
| .PMK | David Harris | Einstellungsdateien | Pegasus Mail Keyboard Settings | Apache OpenOffice | Apache Software Foundation |
| .PO | Sublime HQ Pty Ltd | Entwicklerdateien | Portable Object | Apache OpenOffice | Apache Software Foundation |
| .POM | Apache Software Foundation | Sonstige Dateien | Maven Build File | Maven | Apache Software Foundation |
| .POT | Microsoft Corporation | Textdateien | PowerPoint Template | Apache OpenOffice | Apache Software Foundation |
| .POTX | Microsoft Corporation | Textdateien | PowerPoint Open XML Presentation Template | OpenOffice Impress | Apache Software Foundation |
| .PPS | Microsoft Corporation | Textdateien | PowerPoint Slide Show | Apache OpenOffice | Apache Software Foundation |
| .PPSX | Microsoft Corporation | Textdateien | PowerPoint Open XML Slide Show | Apache OpenOffice | Apache Software Foundation |
| .PPT | Microsoft Corporation | Textdateien | PowerPoint Presentation | Apache OpenOffice | Apache Software Foundation |
| .PPTX | Microsoft Corporation | Textdateien | PowerPoint Open XML Presentation | Apache OpenOffice | Apache Software Foundation |
| .PRG | Open Source | Ausführbare Dateien | Program File | OpenOffice Writer | Apache Software Foundation |
| .PSV | Sony | Spieldateien | PlayStation 2 Save File | Apache OpenOffice | Apache Software Foundation |
| .PSW | Microsoft Corporation | Sonstige Dateien | Windows Password Reset Disk File | Apache OpenOffice | Apache Software Foundation |
| .PWI | Microsoft Corporation | Textdateien | Pocket Word Document | Apache OpenOffice | Apache Software Foundation |
| .README | The Document Foundation | Textdateien | Readme Text Document File | OpenOffice Writer | Apache Software Foundation |
| .RNG | Nokia | Audiodateien | Nokia Composer Ringtone | Apache OpenOffice | Apache Software Foundation |
| .RPT | SAP | Textdateien | Crystal Reports File | OpenOffice Writer | Apache Software Foundation |
| .SBL | Adobe Systems Incorporated | Grafikdateien | Shockwave Flash Object | Apache OpenOffice | Apache Software Foundation |
| .SCRIPT | Unknown Developer | Ausführbare Dateien | Generic Script File | OpenOffice Writer | Apache Software Foundation |
| .SDA | Oracle Corporation | Vektorbilddateien | StarOffice Drawing | Apache OpenOffice | Apache Software Foundation |
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