Examples of websites using
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)
with
Chap
(Chap is a serif font designed by Florian Schick and Lauri Toikka of Schick Toikka. Released in 2016, the font offers a range of styles, including regular, italic, bold, and bold italic)