Kleki is a free web-app for painting and editing. It features different brushes, layers, and filters. Kleki includes editing tools that enable the user to add contrast, hue, curves, and perspective, as well as to rotate, transform, flip, and resize images. The tool allows the user to either create images, or to "play with" photos. A variety of input devices can be used to create images (pen, touch, mouse, and trackpad). There are videos and tutorials available, as well as links to free art tutorials and resources. Images can be saved, uploaded/imported, and stored in a browser.
It is also available as a Chrome app.