Examples of websites using
Lato
(Lato is a sans-serif font designed by Łukasz Dziedzic and released by tyPoland in 2010. The font family consists of two styles, regular and bold, with each style available in a wide range of weights and matching italics)
with
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)