Carbon Calculators

A list of available carbon calculators

Zerofootprint - Very comprehensive, yet easy to use. Provides both defaults and explanations for the defaults and the items

Can create an ID and try it out on their general site - Sign-in
They do customizations for communities, have done some for larger cities
Allows users to compare to other countries and cities, as well as showing averages for the people using the site
Incorporates a social network component - setting up affinity groups, teams
Company is a not-for-profit
Have contacted them to explore a Needham-specific implementation - See Talk Page
They have a set of applications for kids and teachers, including a kids calculator

This site leads with the social networking component, and the carbon calculator is actually hard to find
Very simplistic calculator - easy to use, but provides limited information
Much more cluttered site - news snippets, ads, etc.
Created and underwritten by Waste Management, but intended to be run by the online community