Examples of websites using
Calibre
(Calibre is a sans-serif font designed by Kris Sowersby and released by Klim Type Foundry in 2011. The font family consists of 10 styles, including regular, italic, bold, and bold italic variations)
with
Source Serif
(Source Serif is a serif font designed by Frank Grießhammer. It offers multiple styles and weights, providing a versatile range of options for various design needs)