Rapid Storyboarding and a FREE Template

It is from :

http://www.elearningart.com/

What it’s good for

You can use it for:

Building quick scenarios where characters are interacting with each other or the user. And I also like having my characters as silhouettes. I can’t tell you how many times meetings about mockups get turned into hour long arguments about the character I chose for the mockup.
Mocking up interactions that involve buttons, whitespace, etc

You can download it with instructions from here :

http://blog.elearningart.com/rapid-storyboarding-and-a-free-template/