Sustainable By Design provides the following suite of shareware tools to aid with solar design and building-energy analysis:
  • SunAngle determines the position of the sun at any time of day at any location on Earth.
  • SunPosition calculates sun angles over the course of a year.
  • SunPath produces graphic representations of the sun's course through the sky.
  • Overhang Design analyzes the performance of simple window overhangs.
  • Window Heat Gain calculates the solar-thermal gain through windows.
  • CFL Economics compares the lifetime operating costs of compact fluorescent lamps and incandescent lamps.