Free Permaculture Design Software

I'm currently working on a permaculture design for Fresh Roots Farm in Atlanta. Here is a list of the free software I plan on using to publish my designs:

  1. Google SketchUp, for complicated subsystem designs (i.e. indoor greywater treatment system)
  2. Autodesk Project Cooper, for basemap and sector/zone overlays
  3. cropplanning, an open source software for managing plants