Google Fonts is the world’s best Web Font service. Offering an intuitive and robust collection of open source designer web fonts. By using their extensive catalog, you can share and integrate typography into any design project seamlessly—no matter where you are in the world.
Fonts In Use is a public archive of typography indexed by typeface, format, industry, and period. Perfect for inspiration and font selection.
Alternatype helps you find free fonts with similar features to the most famous typefaces.
Font Squirrel offers hand-selected typefaces, fonts and webfonts that 100% free to use, presented in an easy-to-use format.