This is no normal photo editor like Photoshop Express or other free photo editor. It is quite similar to Fauxto that was posted previously, but I like this better because it is much smoother and Fauxto was buggy then.
It is a very good photo editor with layers and most basic to intermediate tools you could find at a photoshop. But this is available for free and at the same time you could use this piece of software anywhere you go with a browser.
Below is my trial and I manage to draw something and download it without any problem.
Try out SUMO Paint