|Krita is an open source digital painting and drawing application
You can get regular updates and news at Krita's official site:Krita.org
Krita is part of the Calligra Suite . It contains both ease-of-use and fun features like guided painting (never before has it been so easy to airbrush a straight line!) and high-end features like support for 16 bit images, CMYK, L*a*b and even OpenEXR HDR images.
Krita needs a new handbook: the 1.6 handbook is completely obsolete. Please find the ongoing draft effort at Krita 2 Manual and help out with new content.
The easiest way to get Krita is installing by means of your distribution, e.g. for openSUSE 11.4:
yast -i koffice2-krita