GreenCloud printer is a eco-friendly printer driver to preview all the job before you print and waste paper. 
First it will allow you to save paper, ink and trees ( and money ) by optimizing your printing job. but it is also a pdf creator tool which allow to send easily to your favorite cloud account ( Google Docs, Dropbox, Evernote, Minus.com ). Print to your favorite storage service using pdf format.

Pro version allows to bypass the limitation of 50 pages per printing session

Enterprise version includes the details reporting panel, stats of usage

see the complete description 
http://forum.obviousidea.com/threads/224-GreenCloud-Printer-free-and-pro-version-difference