Selective Laser Sintering project: http://www.thingiverse.com/thing:33697

http://labs.nortd.com/lasersaur/

http://www.buildlog.net/cnc_laser/cnc_build_research.htm

http://www.buildlog.net/buildlog/view_log.php?id=1634

http://www.lightobject.com/CNC-CO2-Laser-C11.aspx

http://www.lightobject.com/CO2-laser-tube-C14.aspx

http://usuaris.tinet.cat/sje/cnc/laser_eng.htm