Google Web Fonts

A never ending list of free fonts available on Google

Google Fonts

google/fonts: Font files available from Google Fonts @GitHub

Google Fonts - Wikipedia, the free encyclopedia
Google Fonts (previously called Google Web Fonts) is an interactive directory of free hosted application programming interfaces for web fonts. It was launched in 2010,[1] and revamped in 2011.[2] Many of the fonts are released under the SIL Open Font License 1.1, while some are released under the Apache License; both arefree software licenses.

Web typography - Wikipedia, the free encyclopedia

Not just 

Getting Started  |  Google Fonts  |  Google Developers

link href="https://fonts.googleapis.com/css?family=Tangerine" rel="stylesheet" type="text/css"

Using Web Tangerine Font :)