I like leafpad but I don't like the GTK+ file selector/chooser so this fork includes code written by me (Mark Tyler) and Dmitry Groshev to implement a more orthodox file picker.

Executables for Windows and GNU/Linux are in the ./bin/ directory.  To run the Windows version you will first need to install mtPaint:

http://mtpaint.sourceforge.net/

You then put the .exe file into the bin directory to run it, e.g.

C:/Program Files/mtpaint-3.20/bin/