MyPaint is a fast and easy open-source graphics application for digital painters. Features include: support for pressure-sensitive graphics tablets, extensive brush creation and configuration options, unlimited canvas, etc. MyPaint comes with a large brush collection including charcoal and ink to emulate natural media, but the configurable brush engine allows you to experiment with your own brushes and with not-quite-natural painting. A Windows version is available. Visit MyPaint’s website for more.