IconStore - Free icon packs by first-class designers
Streamline icons - The world’s largest icon pack library - 100k icons and illustrations.
IconBros - Free and continuously growing high quality icons
Iconjar - Store all your icons in one place, just a click away
IconShock - Over 2 million free icons in 400+ icon sets over 30 styles
Devicons - Iconic font made for developers, code jedis, and designers