| dr5 | Dramatica Story Expert Project |
| dsf | Dramatica Pro Project |
| dsp | Microsoft Developer Studio Project |
| dt7 | Civil Designer DT7 Project |
| dtproj | Integration Services Project |
| dva | DVDAuthorGUI Project |
| dvda | Steinberg WaveLab DVD Audio Project |
| dvdproj | Apple iDVD Project |
| dvp | Digital Video Project |
| dvproj | Deja Vu X3 Project |
| dvproj | Vivia Project |
| dvr | DV Rack Project |
| dwj | Dynamic Submission Project File |
| dwproj | Visual Studio SQL Server Analysis Services Project |
| dwz | Corel DVD MovieFactory Project |
| dxoproj | DxO Optics Pro Project |
| dxstudio | DX Studio Project |
| dzprj | Deep Zoom Composer Project |
| e3a | Hourly Analysis Program HVAC Project Archive |
| e3s | E3.series Project |
| eap | Enterprise Architect Project |
| eapx | Enterprise Architect 14 Project |
| eb | EBwin Project |
| ebp | Baseball Playbook Project |
| ec3 | Epson Print CD v3 Project |
| ec4 | Epson Print CD v4 Project |
| ecp | EasyC Project |
| ecpx | EasyC v4 Project |
| eddx | Edraw Max Project |
| edge | Adobe Edge Project |
| ehp | Help Steward Project |
| ehpx | easyHDR Project |
| eis | EIS Spectrum Analyser Project |
| emmx | Edraw MindMaster XML Project |
| emp | AWR Design Environment Project |
