I want to build some porch planters out of sheets of plywood, but I'm trying to minimize the number of sheets of plywood I buy. 

Is there software that will let me enter all my planter designs and then have it spit out the sheets of plywood with their cuts? Does software exist that converts a project design/CAD('ish) drawing to [bill of materials](http://en.wikipedia.org/wiki/Bill_of_materials)?