| .SDC | Stardock Corporation | Soubory záloh | Stardock Central Download Archive | Apache OpenOffice | Apache Software Foundation |
| .SDD | Programming Sunrise | Datové soubory | Smart Diary Suite Data File | Apache OpenOffice | Apache Software Foundation |
| .SDI | Intuit, Inc. | Datové soubory | QuickBooks Data File | Apache OpenOffice | Apache Software Foundation |
| .SDP | Oracle Corporation | Datové soubory | StarOffice Presentation File | Apache OpenOffice | Apache Software Foundation |
| .SDS | Oracle Corporation | Datové soubory | OpenOffice.org Chart | Apache OpenOffice | Apache Software Foundation |
| .SDV | Pinnacle Systems Inc. | Video soubory | Studio DV Project File | Apache OpenOffice | Apache Software Foundation |
| .SDW | LizardTech | Soubory GIS | MrSID World File | Apache OpenOffice | Apache Software Foundation |
| .SFS | Open Source | Komprimované soubory | Squashfs File Archive | Apache OpenOffice | Apache Software Foundation |
| .SILK | Microsoft Corporation | Soubory tabulkového procesoru | Microsoft Excel Symbolic Link Format | Apache OpenOffice Calc | Apache Software Foundation |
| .SKI | Motorola | Soubory nastavení | Motorola Phone Skin File | Apache OpenOffice | Apache Software Foundation |
| .SKV | Microsoft Corporation | Datové soubory | Semicolon Separated Values File | Apache OpenOffice | Apache Software Foundation |
| .SMF | Oracle Corporation | Textové soubory | StarMath Formula File | Apache OpenOffice | Apache Software Foundation |
| .SMS | Sega | Soubory her | Sega Master System ROM | Apache OpenOffice | Apache Software Foundation |
| .SOB | Apache Software Foundation | Rastrové obrazové soubory | OpenOffice.org Impress Bimap Styles File | Apache OpenOffice | Apache Software Foundation |
| .SOC | Apache Software Foundation | Soubory nastavení | OpenOffice.org Configuration File | Apache OpenOffice | Apache Software Foundation |
| .SOD | id Software | Soubory her | Spear Of Destiny Data File | Apache OpenOffice | Apache Software Foundation |
| .SOF | Apache Software Foundation | Datové soubory | Colour Palettes And Various Style Elements File | Apache OpenOffice | Apache Software Foundation |
| .SOG | Apache Software Foundation | Datové soubory | Apache OpenOffice (OpenOffice.org) Colour Palettes | Apache OpenOffice | Apache Software Foundation |
| .SRS | Microsoft Corporation | Soubory nastavení | Outlook Send/Receive Settings File | Apache OpenOffice | Apache Software Foundation |
| .STC | Adobe Systems Incorporated | Webové soubory | Contribute Connection Key File | Apache OpenOffice | Apache Software Foundation |
| .STD | Oracle Corporation | Vektorové obrazové soubory | Apache OpenOffice Drawing Template | Apache OpenOffice | Apache Software Foundation |
| .STE | Adobe Systems Incorporated | Soubory nastavení | Dreamweaver Site Settings File | OpenOffice Writer | Apache Software Foundation |
| .STI | Oracle Corporation | Datové soubory | StarOffice Presentation Template | Apache OpenOffice | Apache Software Foundation |
| .STM | Microsoft Corporation | Datové soubory | Exchange Streaming Media File | Apache OpenOffice Calc | Apache Software Foundation |
| .STW | Oracle Corporation | Textové soubory | StarOffice Document Template | Apache OpenOffice | Apache Software Foundation |
| .SVM | Star Division | Rastrové obrazové soubory | StarView Metafile | Apache OpenOffice | Apache Software Foundation |
| .SVN | Apache Software Foundation | Datové soubory | Subversion Data File | Subversion | Apache Software Foundation |
| .SWX | Apache Software Foundation | Textové soubory | OpenOffice.org 1.0 Text Document | Apache OpenOffice | Apache Software Foundation |
| .SXC | Sun Microsystems | Soubory tabulkového procesoru | StarOffice Calc Spreadsheet | Apache OpenOffice Calc | Apache Software Foundation |
| .SXD | ESRI | Soubory GIS | ArcScene Document | Apache OpenOffice | Apache Software Foundation |
| .SXG | Oracle Corporation | Textové soubory | Apache OpenOffice Master Document | Apache OpenOffice | Apache Software Foundation |
| .SXI | Oracle Corporation | Datové soubory | StarOffice Impress Presentation | Apache OpenOffice | Apache Software Foundation |
| .SXW | Oracle Corporation | Textové soubory | StarOffice Writer Document | Apache OpenOffice | Apache Software Foundation |
| .THM | Sony | Neobvyklé soubory | Sony Ericsson Mobile Phone Theme File | Apache OpenOffice | Apache Software Foundation |
| .TIS | Acronis | Soubory záloh | True Image Script | Apache Lucene | Apache Software Foundation |
| .TML | Odetics Broadcast | Datové soubory | AIRO Timeline File Format | Apache Tapestry | Apache Software Foundation |
| .TSV | Unknown Developer | Datové soubory | Tab Separated Values File | Apache OpenOffice | Apache Software Foundation |
| .TVX | Doug Cutting | Neobvyklé soubory | Apache Lucene Term Vector Index File | Apache Lucene | Apache Software Foundation |
| .UOF | The Document Foundation | Textové soubory | Uniform Office Document | Apache OpenOffice | Apache Software Foundation |
| .URD | Kinook Software, Inc. | Databázové soubory | Ultra Recall Database File | Apache OpenOffice | Apache Software Foundation |
| .UZN | Apache Software Foundation | Datové soubory | Tesseract-Migneuzn Tool Output File | Tesseract-OCR | Apache Software Foundation |
| .VOR | Sun Microsystems | Neobvyklé soubory | StarOffice Template | Apache OpenOffice | Apache Software Foundation |
| .VSDX | Microsoft Corporation | Vektorové obrazové soubory | Visio Drawing | Apache OpenOffice | Apache Software Foundation |
| .WAR | Oracle Corporation | Komprimované soubory | Java Web Archive | Apache Tomcat | Apache Software Foundation |
| .WK! | IBM | Soubory tabulkového procesoru | Lotus 1-2-3 Spreadsheet | Apache OpenOffice | Apache Software Foundation |
| .WK1 | IBM | Datové soubory | Lotus Worksheet | Apache OpenOffice Calc | Apache Software Foundation |
| .WKE | IBM | Soubory tabulkového procesoru | Lotus 1-2-3 Educational Version Worksheet | Apache OpenOffice | Apache Software Foundation |
| .WN | WN | Webové soubory | WN Web File | OpenOffice Writer | Apache Software Foundation |
| .WR! | IBM | Soubory tabulkového procesoru | Lotus 1-2-3 Spreadsheet | Apache OpenOffice | Apache Software Foundation |
| .XBA | Oracle Corporation | Soubory doplňků | OpenOffice.org Basic Module File | Apache OpenOffice | Apache Software Foundation |
| .XCU | Apache Software Foundation | Soubory nastavení | OpenOffice.org Configuration File | Apache OpenOffice | Apache Software Foundation |
| .XLB | Microsoft Corporation | Soubory nastavení | Excel Toolbars File | Apache OpenOffice | Apache Software Foundation |
| .XLS | Microsoft Corporation | Soubory tabulkového procesoru | Microsoft Excel 97 To 2003 Spreadsheet | Apache OpenOffice Calc | Apache Software Foundation |
| .XLSB | Microsoft Corporation | Soubory tabulkového procesoru | Excel Binary Spreadsheet | Apache OpenOffice | Apache Software Foundation |
| .XLSM | Microsoft Corporation | Soubory tabulkového procesoru | Microsoft Excel Open XML Macro-Enabled Spreadsheet | Apache OpenOffice Calc | Apache Software Foundation |
| .XLSX | Microsoft Corporation | Soubory tabulkového procesoru | Microsoft Excel Open XML Spreadsheet | Apache OpenOffice | Apache Software Foundation |
| .Y | Microsoft Corporation | Rastrové obrazové soubory | Subsampled Raw YUV Image | OpenOffice Writer | Apache Software Foundation |
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