tools
Rimast, mast and rigging calculation — www.rimast.com
Windesign, Wolfson Unit VPP — www.wumtia.soton.ac.uk/brochures/WindesignBrochure.pdf
Blender, free rendering software — www.blender.org
Hanley Innovations, aerodynamics software — www.hanleyinnovations.com
Thinkdesign — www.think3.com
MaxSurf — www.formsys.com/Maxsurf/MSIndex.html