| hmxp | Help and Manual 4 Project |
| hmxz | Help and Manual 4 Compressed Project |
| hpj | Windows Help Project |
| hprj | proDAD Heroglyph Project |
| hproj | HOBOware Pro Project |
| htcrtproj | Jade Kitchen Project |
| hue | HUE Animation Project |
| hxm | Microsoft Help 2 HxMerge Project |
| hxp | Haxe Project |
| hxproj | FlashDevelop Project |
| hzp | CrossWorks for ARM Project |
| iadproj | iAd Producer Project |
| iax | InstallAnywhere.NET Project |
| ibb | ImgBurn Project |
| icpr | IconUtils Project |
| ide | ideCAD Project |
| idr | CompactDraw Project |
| if | IFWin Project File |
| iip | Install Creator Project |
| iit | Install Creator Project |
| ijp | Instant JChem Project |
| ikt | MagicMaps Tour Explorer Project |
| ilj | Honestech VHS to DVD Project |
| imovieproj | iMovie Project |
| imovieproject | iMovie Project |
| inform | Inform for Mac OS X Project |
| ip3 | ParticleIllusion 3 Project |
| ipj | Impatica OnCue Project |
| ipj | Autodesk Inventor Project |
| ipo | InstallShield Object Project |
| ipproj | Visual Studio InfoPath Project |
| ipr | InstallShield Project |
| ipr | IntelliJ IDEA Project |
| iproject | iClone Project |
| iqp | ITEM QRAS Project |
