Examples of websites using
Px Grotesk
(Px Grotesk is a sans-serif font designed by Nicolas Eigenheer and released by Optimo in 2013. The font family consists of multiple weights and styles that provide a versatile typographic solution)
with
Plain
('Plain' is a sans-serif font designed by François Rappo and released by Optimo in 2013. The family consists of 11 individual styles, including regular, italic, and bold weights)