If you need to put together a storyboard, you have lots of options. But the process of laying out the pages and dealing with changes to shot order or selection can get tedious. Fortunately there is a free solution called Directors Boards which alleviates most of the challenges (no, it won't draw for you).
This great program is based on Filemaker, but doesn't need you to have the full program installed in order to run. You essentially load in information regarding the shots including the audio and video columns, shot number, and a thumbnail image. Directors Boards then allows you to organize the shots as well as create a sldieshow presentation or print out professional looking storyboards. The product is cross-platform and free... what more do you need? Well there is a more robust version called Directors Notebook, which we are putting through its paces and will have a detailed review soon.