Open Sans

Open Sans is a sans-serif typeface designed by Steve Matteson, added to Google Fonts in 2011. It's available in 6 weights, as a variable font.

This is one of 10 character sets supported (cyrillic, cyrillic-ext, greek, greek-ext, hebrew, latin, latin-ext, math, symbols, vietnamese). Being free and open source, it's a great choice for web projects, print, and branding — and it's a frequent result in the font finder.

Putting it on a site? See the guide to using custom fonts on the web.