SAI is not free but for a more than a reasonable price ,we have very, very interesting options of painting. It is really one of my favorites in terms of colors blending and the effect of the brush on the canvas.
this is my contribution so that more people can enjoy this program. Here you have it. The manual explaining how to create brushes, my own tools, and a PDF explaining the whole process and a gallery of the tools.
Click into the image to download
