PCB layout Programs:
Altium Designer http://www.altium.com/
PADs layout http://www.mentor.com/products/pcb/pads/
Proteus Schematic and PCB layout http://www.labcenter.co.uk
http://www.solarnavigator.net This site is crammed full of information for students of renewable energy technology, boat design and marine history. Also home to the Solar Navigator project, a solar marine race across the globe.