European company SPRANQ has made available a new font named Ecofont.
The font is based on Vera Sans and has tiny holes in the surface of the characters.
The developers claim that these tiny holes can save 20% ink while printing documents in this font.
They say about the Ecofont:
Appealing ideas are often simple: how much of a letter can be removed while maintaining readability? After extensive testing with all kinds of shapes, the best results were achieved using small circles. After lots of late hours (and coffee) this resulted in a font that uses up to 20% less ink. Free to download, free to use.