Examples of websites using
Proxima Nova
(Proxima Nova is a sans-serif font designed by Mark Simonson Studio. It has a balanced and modern design, with a total of 120 individual styles including 12 weights and matching italics to suit various design needs)
with
Europa
(Europa is a sans-serif font designed by Fabian Leuenberger and released by EuropaType in 2011. The font family consists of 36 individual styles, including regular, italic, thin, bold, and condensed variations)