From Just Solve the File Format Problem
DGI is a raster graphics format apparently associated with something called Digi-Pic.
- TURBODGI.ZIP: Turbo DiGI Vision Display Utility, a viewer for MS-DOS by Basi Angulo
- CGADGI.ZIP: Viewer for MS-DOS
- CONV125.ZIP → DGIMAC.EXE: MS-DOS utility to convert DGI to MacPaint format
- TIPS.ZIP → TIPS.DGI (may be NSFW)