| deform | FontTwister Deform Guide Line Data |
| defxml | Danea Easyfatt Data |
| dei | Gerber Design Engineered Interface Data |
| dek | Memorize-It Deck File |
| del | Lucene Deleted Documents Data |
| del | PCTracker Undelete Tracking Data |
| delta | Firebird SQL Delta Data |
| deltaskin | Delta Emulator Skin |
| dem | Melco Embroidery Format Data |
| dem | SOBEK Digital Elevation Map Data |
| dem | Vflo Digital Elevation Model Data |
| den | XMVB Density Data |
| deos | Driver Easy Offline Scan Data |
| dep | HAHTsite Project Dependencies Data |
| deploy | ClickOnce Deployment Data |
| der | Certificate File |
| des | Interscope BlackBox DES Data |
| des | Medlin Payroll Software Sales Code Information |
| des | Pro/DESKTOP CAD Data |
| des-se | Sony Ericsson Xperia X10 Description Data |
| description | Multilizer PDF Translator Description Data |
| desg | Stuffit DropSegment Data |
| desktop | DesktopX Windows Desktop Theme |
| dess | Microsoft Device Emulator Saved State Data |
| det | Act! Email Message |
| deu | Adobe Acrobat Reader German Language Data |
| deu | Unreal Engine German Language Data |
| dev | E-Sword Devotional Data |
| dev | Railway Operation Simulator Development Data |
| devhelp | KDevelop DevHelp Documentation |
