Free Green offers free plans for green homes. Some plans include energy consumption comparisons between building to code and building with green features. Each plan explains green features.
I downloaded plans for one house to check things out, and the amount of information was impressive. I was expecting floorplans and elevations, but the PDFs included cost estimates, links to products featured in the design, projections of energy costs and a detailed listing of how the house rates in LEED.
The site is searchable, and plans are customized to your location before you download them. You also can purchase blueprints, too. If you're looking for plans, be sure to check out this site.