in action on 37signals.com
Kepler is available from Fonts.com, Fontspring and Typekit.
Proxima Nova is available from Fonts.com, Fontspring, MyFonts, Typekit and YouWorkForThem.
Acta Display is available from Fonts.com and MyFonts.
Lucida Grande is available from Fonts.com and MyFonts.
Found by @mikesten on 29 Oct 2012.
Liked by:
@mikesten
@stefunnyroar
@AnnaMolo
@tradeandcraft
@ughnett
@my_chiguai