Krita is a creative sketching and painting application based on Calligra technology. Whether you want to create art paintings, cartoons, concept art or textures, Krita supports most graphics tablets out of the box.
Browser requirements: Google Chrome, Mozilla Firefox, Safari. File management (open, save, and edit Calligra files) available via cloud storage services connected to your rollApp account: Dropbox, Google Drive, Box.
its too slow on mine