A friend showed this site to me the other day called Lucidchart.
She was using it to create a workflow model for her students to show them the next step they needed to take to complete their coursework. But, she also suggested it could be used to help kids make a dichotomous key in science class, show character development in a novel, illustrate the choices a character like Hamlet must make, or show how a historical event could have gone differently. Flow charts are really big right now for project planning and work flow. I could see Lucidchart being a great tool to help students reflect on their decision making and work flow to better prepare them for the business world. Cool stuff!