Examples of websites using
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)
with
Source Sans Pro
(Source Sans Pro is a Sans Serif font designed by Paul D. Hunt. The font family includes six styles, each with regular, italic, bold, and bold italic variations, providing a versatile range of options for designers)