Google Fonts - Making the web more beautiful, fast, and open through great typography
Font Awesome - Font Awesome makes it easy to add vector icons and social logos to your website. And version 5 is redesigned and built from the ground up!
Font Squirrel - Font Squirrel scours the internet in search of FREE, highest-quality, designer-friendly, commercial-use fonts and presents them for easy downloading. We don't have the most, but we do have the best.
Flaticon - A database of free vector icons.
Fontspace - Free downloads of 70,000+ legally licensed fonts that are perfect for your design projects. The best place in the universe to search for amazing fonts.
Fontello - Tool to build custom fonts with icons.