| .dlt |
DELTA Binary Dataset File |
| .dsg |
Doom Saved Game |
| .dip |
DipTrace Printed Circuit Board File |
| .dd |
DiskDoubler Archive |
| .dev |
Dev-C++ Project File |
| .dqy |
Excel Query File |
| .dgs |
Dagesh Pro Document |
| .dav |
DVR365 Video File |
| .ddat |
DivX Temporary Video File |
| .dinfo |
DivX Temporary Video Info File |
| .dmsk |
DivX Temporary Video Data File |
| .dicproof |
Microsoft Dictionary Proofing File |
| .dnc |
Windows Dancer File |
| .djv |
DjVu Image |
| .dwp |
DarkWave Studio Project File |
| .dwz |
DVD MovieFactory Project File |
| .dtf |
Domino Temporary File |
| .ded |
Dr. Engrave Document |
| .dwl |
TurboCAD Drawing Lock File |
| .dv4 |
Bosch Security Systems CCTV Video File |
| .dbgsym |
Debug Symbols File |
| .dhcd |
DHCD Computing Application Data File |
| .dis |
Oracle Discoverer Workbook |
| .dxls |
DashXL Skin Set File |