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!
Zwicon - A simple, carefully designed collection of icons
Font Generator - Tons of font ideas in one click
Streamline icons - The world’s largest icon pack library - 100k icons and illustrations.
Typographic Project - Offers inspiration for using Google’s font library
Vivid JS - A highly customizable, open source SVG icons library