PrintWhatYouLike is a free web-based solution meant for printing more efficient web pages (without ads, unecessary graphics, etc.).
GreenPrint is a $29 software download that also lets you more efficiently print documents on your computer (avoiding the three lines on the last page problem.)
I’m leaning toward the first option but haven’t installed the browser plug-in just yet.
EcoFont – if it’s easy to read, looks great. Theoretically 20% savings on ink just by printing holes in your characters instead of the full character.
What a concept!