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!
1000 Detailed Creative Icons - Carefully designed icons with tons of fine details
IconStore - Free icon packs by first-class designers
Streamline icons - The world’s largest icon pack library - 100k icons and illustrations.
Veganburger - A better version of the classic hamburger icon
Iconjar - Store all your icons in one place, just a click away