Contraptor is a collaborative project with many people from all over the world contributing ideas, code, designs etc.
Below is the (incomplete) list of people that have been involved with Contraptor in one way or the other.
Vitaly Mankevich - concept, designs, implementation, testing, documentation, fabrication
Riley Porter - support, tutorials, video, laser cutter, designs, fabrication, promotion
Arthur Wolf - designs, testing, bug fixes, metric version, promotion
Mike Gittelsohn - trial angle fabrication on Shopbot
Sam Putman - ideas, support
Jason Alafgani - supply chain optimization
Christoph Schwaeppe - support, documentation, metric version, testing
Simon Beard - Sketchup plugins, support, testing
Angus Hines - trial angle fabrication on Shopbot, alpha angle
more to come..
Chris Meighan and Mike Ellery for Arduino GCode Interpreter
Ladyada for early support