| .SBL | Adobe Systems Incorporated | Grafické soubory | Shockwave Flash Object | Apache OpenOffice | Apache Software Foundation |
| .SDA | Oracle Corporation | Vektorové obrazové soubory | StarOffice Drawing | Apache OpenOffice | Apache Software Foundation |
| .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 |
| .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 |
| .STI | Oracle Corporation | Datové soubory | StarOffice Presentation Template | Apache OpenOffice | 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 |
| .SWX | Apache Software Foundation | Textové soubory | OpenOffice.org 1.0 Text Document | Apache OpenOffice | 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 |
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