Great TED Talk on Wiki House, shared under Creative Commons License, C & C machine cuts the parts, slots together without tools, 2-3 people can build a house in a day.
Wikihouse.cc the Open Source Construction Set. Print Your Own House.
Architect Alastair Parvin presents a simple but provocative idea: what if, instead of architects creating buildings for those who can afford to commission them, regular citizens could design and build their own houses? The concept is at the heart of Wikihouse, an open source construction kit that means just about anyone can build a house, anywhere.