It is a software you use a a base for your drawing. With the tool you create random shapes until you get to see something interesting appear. You begin your drawing with abstraction, but it can soon give you an interesting design. It looks great for warmup and brainstorming.
|Alchimy software interface|
It is free to use. Yep. Completely free.
You can have more information and download it here: http://al.chemy.org/