Powder 3D Printer

Pwdr, the open source powder printer

http://hackaday.com/2012/08/08/pwdr-the-open-source-powder-printer/

An Open Source Powder Based 3D Printer : Is Desktop Laser Sintering on the Horizon?

http://www.shapeways.com/blog/archives/1559-an-open-source-powder-based-3d-printer-is-desktop-laser-sintering-on-the-horizon.html

DIY 3D-printer for powder-based prototyping: Pwdr!

http://3dprintingindustry.com/2012/08/11/diy-3d-printer-for-powder-based-prototyping-pwdr/