Open Source Bricks
This got my interest because it uses dirt and an inexpensive 20-ton press to make bricks. I spent the summer of 1987 working at an orphanage outside of Cap-Haïtien using cinder blocks made on-site. Since the design of the brick press is available for anyone to use, I could see a village using a portable brick press to help build new buildings.
The cost of raw materials for cinder blocks is more than the pressed bricks — cement is needed for the cinder blocks, pressed bricks only need dirt — and the manpower needed looks roughly equal. The trouble comes because, as cheap as it is, the brick press is more expensive than the equipment needed for creating cinder blocks,
Still, I’m curious.