| wew | Debugging Tools for Windows Saved Workspace |
| wfo | Delphi Runimage File |
| wfs | Windows Script File |
| whl | Python Wheel Package |
| widget | HybridJava Widget |
| win | Visual FoxPro Window File |
| wiq | Visual Studio Work Item Query |
| wixlib | WiX Library File |
| wixmsp | WiX XML Patch File |
| wixmst | WiX Transform File |
| wixobj | WiX Object File |
| wixout | WiX XML Output File |
| wixpdb | WiX Debug File |
| wixproj | WiX Toolset Project File |
| wkf | KF Webserver Script |
| wli | WL Intermediate Data |
| wln | Novell Localisation Workbench Workspace |
| wlog | WinDev Runtime Log |
| wmb | 3D Gamestudio Compiled Map |
| wmls | WMLScript File |
| wo | WebObjects Object |
| woa | WebObjects Application |
| wod | WebObjects Declaration |
| woo | WebObjects Object |
| workspace | Code::Blocks Workspace |
| wrn | Eclipse WRN Data |
| wscript | Waf Wscript |
| wsct | WinDev Test Scenario |
| wsdd | Axis Web Service Deployment Descriptor |
| wse | Wise Package Studio Script |
| wsi | Wise Package Studio Installer Package |
| wsm | Wise Package Studio Merge Module |
| wsrc | WAIS Source File |
| wte | WinDev Report Template |
| wwn | WebDev Browser Procedures |
