GreenCloud help you to cut cost on printing for entreprise, and in the report and stats module, there is a carbon data. Nevertheless, it is still not a full carbon footprinting calculation software ( like Ecometrica, http://www.figuris.fr/ project in French )
you can also choose an online solution for carbon footprinthttp://www.carbonfootprint.com/calculator.aspx
Is you know any better software, please drop a comment about it, it will be nice to get your feedback about such solutions !