Pixia is a great drawing and image editing software but totally free!
It supports unlimited layers,
10,240*10,240 pixels layout, effect plug-ins (also accepts Photoshop's plug-ins), undo 100 times.
Also can working with your TWAIN devices (eg. Scanner or Digital Camera and Digitizer.
Great for graphics tablet users!
This website, http://park18.wakwak.com/~pixia/ offers the latest upgraded versions,
all downloads are always free, and available in multiple languages, resources and support for Pixia users is also available.
I've been using Pixia for several years and I love it. It was the first program I used to learn to draw with a mouse. Recently, I bought a graphics tablet. My best friend, on Dreamstime, leda_d, is an amazing artist who uses the graphics tablet. She has inspired and helped me to get into it! To the right, I've posted a few samples of her art. Incredible!!
Pixia is also Free via download.com for more apprehensive downloaders;)
I used Pixia in the following samples of my art: