Source Sans Pro: Adobe’s first open source type family

Source Sans Pro, Adobe’s first open source type family, is a very nice and also free typeface reminiscent of News Gothic. It's available through Google Web Fonts, which can be downloaded:

Can I download the fonts on Google Web Fonts to my own computer?

Yes. To download the fonts, simply add fonts to your collection and click the "Download your Collection" link. You can download the fonts to use them for your mockups, in your documents or to host them on your own server.