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!
Ikonate - Fully customisable & accessible vector icons
1000 Detailed Creative Icons - Carefully designed icons with tons of fine details
Pixel Icons - 6,500 unique icons designed for perfection 🚀
Icons Mind - The Biggest iOS 8, iOS 7 & Android Icons Pack
Veganburger - A better version of the classic hamburger icon