Source Sans is a sans-serif font. It goes well with Din Monospace, Proxima Nova, Calluna, Brandon Text, Lucida Grande, Amatic and Museo Sans. If you're thinking about using Source Sans then try
People commonly tag it as
simple, sans serif, design, art, hand drawn, social, portfolio, quirky, photo and modern.
You can get it from
Font Squirrel, Google Web Fonts and Typekit.