Everything Sketchbooks. 
I’ve seen tons of online Flash based drawing applications, but Odosketch has got to be the most beautifully executed I’ve ever seen, and it’s FREE.
You don’t have to create an account to try it out, but if you want to save your drawings for later you going to have to make an account. Good thing the sign up is dead simple.
I really like the featured sketches on the homepage, when you click on them it takes you to a page where you get to see how they were drawn. I only wish I could fast forward through them.
You totally need to check it out for yourself. Odosketch
