SketchPad - This drawing tool is easy to use with many different effects to make your drawings look great. You can download your image or print right from the website.
Pencil Madness - Pencil Madness is a neat tool for drawing online. You can pick different effects to easily add a shading effect to your drawings. There are multiple color and drawing shape options. Save your drawings as a JPG file and use it anywhere.
Sumo Paint - For the free version of this program, there are many options available to create pretty awesome drawings. Choose from many different colors and effects. You can blend and blur colors together. Save to your computer to use the file later. The Sumo Paint Pro online version costs $4 per month. There is also a $1.99 iPad app available.
FlockDraw - Drawing with friends is always more fun. This tool allows the creator of the document to share the unique web address with friends to collaborate together on a drawing. The options are limited in this tool and you can only save it as a link to view the image. You can always screenshot the image to have a copy on your computer if you choose. There is also a $2.99 iPad app for this tool as well.