Weatherization Assistance Program
DOE's Building Energy Codes Program (BECP)
DOE's Resource Center
DOE's Publications
Weatherization Assistance Program
2009 IECC International Energy Conservation Code - Free Download
best of building science - videos
Oak Ridge National Laboratory - ORNL
ONRL - Online Simple Whole Wall R-value Calculator
National Fenestration Rating Council (NFRC)
Inspectapedia.com - It is probably here!
ColoradoENERGY.org - Insulation Values
Energy Star Thermal Bypass Check List & Guide
Energy Star Recommended Levels of Insulation
HUD Heating Degree Days Database Area Selection
Home Energy Saver - Online Energy Audit Software