Illus is a minimal drawing program based on Python and Tkinter.
Illus is a minimal illustration app based on Python and Tkinter. Using Illus one can stimulate the black-board environment, take a class or draw a picture. Illus will have all the features of a modern illustration app sans clutter.
Free drawing software for Windows, Mac OS X, and Linux
...Dia can read and write a number of different raster and vector image formats. Software developers and database specialists can use Dia as a CASE tool to generate code skeletons from their drawings. Dia can be scripted and extended usingPython.