| .safariextz |
Apple Safari Extension Package |
| .syn |
SimSynth Document |
| .sparc |
Skype Plugin Archive |
| .skypechatstyle |
Chat Style File |
| .sublime-package |
Sublime Text Package File |
| .seplugin |
AppleScript Editor Plug-in |
| .sugar |
Espresso Plug-in |
| .sa9 |
Hue and Cry Photoshop Plug-in |
| .so-abi |
Cocoa AbiWord Plug-in |
| .tmbundle |
TextMate Bundle File |
| .tbp |
Tekla BIMsight Project file |
| .tpi |
EDIUS Plugin File |
| .tgp |
Terragen Plugin |
| .t3x |
TYPO3 Compressed Extension |
| .tko |
AMX Software Module File |
| .vst |
VST Audio Plugin |
| .vbox-extpack |
Oracle VM VirtualBox Extension Pack |
| .vdf |
Valve Data File |
| .vsix |
Visual Studio Extension |
| .vsl |
Visio Add-on |
| .wlz |
Winamp Language Pack |
| .wbm |
Wireless Bitmap Image |
| .wie |
WordPress Widget Export File |
| .wowsl |
WOW Slider |