I tweeted and G+ about this story yesterday but I also wanted to add it here for anyone who might stumble onto it. If you thought Open Source was just about free software, limited to maybe something you would run on your desktop or phone, well you couldn't be more wrong. There is a movement of people who are applying Open Source philosophy and licensing to a scale you have probably never considered, Industrial Machines. The creation of physical working solutions for things like farming and agriculture. We are talking things like brick presses, bread ovens, tractors, saws, and cement mixers.
Probably one of the biggest efforts in this field, if not flat-out the biggest, is the Global Village Construction Set
I really encourage you to check it out opensourceecology.org.