Under the hood
Helvetica Neue is available from Adobe Fonts.
Open Sans is available from Adobe Fonts, Font Squirrel, Google Web Fonts, MyFonts and Typekit.
Baskerville is available from Adobe Fonts, Fonts.com, Fontspring, MyFonts and YouWorkForThem.
Lucida Grande is available from Adobe Fonts, Fonts.com and MyFonts.