DigiPaint 4

Paint package that complimented the earlier release of Newtek's DigiView digitizing software.
DigiPaint was very powerful for the time, and allowed you to paint
in the Amiga's special 4096 color Hold and Modify (HAM) mode.

Here is the full source for you to study/enjoy:

DigiPaint 4

Download Binary of DigiPaint 1.0