Maven Pro is a free sans serif font designed by Joe Prince. It currently consists of a single weight, but the creators promises more to come. I think it looks incredibly slick and fine tuned. You’re free to donate: all proceeds go to charity.
(However, the site doesn’t say wether the font is okay to use in web design as a @font-face)
Update: After reading the ReadMe it clearly states it’s okay to embed the font with @font-face:
This font CAN be used with @font-face and the web font files are included, enjoy!
EOT, SVG, WOFF and TTF are included, as well as the regular OTF font file. Awesomeness.
