Under the hood
Museo Sans is available from Font Squirrel, Fonts.com, Fontspring, MyFonts and Typekit.
Quicksand is available from Font Squirrel, Google Web Fonts and Typekit.
Museo Slab is available from Font Squirrel, Fonts.com, Fontspring, MyFonts and Typekit.
Museo is available from Font Squirrel, Fonts.com, Fontspring, MyFonts and Typekit.