Program: Krita
License: GNU General Public License v2
Description: Krita is a program for sketching and painting, offering an end–to–end solution for creating digital painting files from scratch by masters.
Website: http://krita.org/
Other: Windows download is available from here: http://www.kogmbh.com/download.html
Building instructions: http://community.kde.org/Calligra/Building_Calligra_on_Windows
Thanks.