LCAiT (Popularity: )
http://www.lcait.com Software for life cycle assessment -- calculating the environmental performance of products, services, and organisations. "Light" version can be downloaded free.
eiolca.net - Free Life Cycle Assessment on the Internet (Popularity: )
http://www.eiolca.net Uses 1992 input-output table of US economy to show economic and environmental effects of producing 500 commodities. Environmental impacts of production are expressed in terms of Conventional Pollutants, Greenhouse Gases, ...