| wmmp | Windows Movie Maker Project |
| wmpk | ArcGIS for Windows Mobile Project |
| work | Octatrack Active Project |
| wowproj | AddOn Studio Project |
| wowsl | WOW Slider Project |
| wp3 | Microsoft Photo Story Project |
| wph | WAsP Project |
| wpj | Microsoft Works Project |
| wpr | WAsP v7 Project |
| wprj | WebZIP Project |
| wproj | Wwise Project |
| wrb | OpenWind Project Design Grid |
| wspd | WebsitePainter for Mac Project |
| wsve | Wondershare Filmora for Mac Project |
| wtp | WaveThunder Project |
| wve | Cyberlink WaveEditor Project |
| wve | Wondershare Filmora Project |
| wvp | MagicHTML Web Video Player Project |
| wvse | Wondershare Filmora for Mac Project |
| wwp | WebDev Project |
| wyg | Cast Soft wysiwyg Project |
| wyp | wyBuild Project |
| wyt | Cast Soft wysiwyg Template |
| wzx | Wizard MatDesigner Project Archive |
| xbp | ApSIC Xbench Project |
| xch | Link Assistant Project |
| xclp | Microsoft Research Cliplets Project |
| xcode | Xcode Project |
| xcodeproj | Xcode Project |
| xda | Sencha Architect Project Archive |
