Examples of websites using
Open Sans
(Open Sans is a sans-serif font designed by Steve Matteson. It offers a wide range of styles, including regular, italic, bold, bold italic, and light)
with
Futura PT
(Futura PT is a geometric sans-serif font designed by Vladimir Yefimov and Isabella Chaeva and released by ParaType in 1991. The font family consists of multiple styles with varying weights and italics)