Flaticon, the largest database of free vector icons
450+ Free Line Icons for Designers and Developers - LineIcons
Feather - Simply beautiful open source icons
Jam Icons / 890+ pixel perfect free icons
Free icons - SVG, PNG, & Icon Font - Thousands of free icons
Free icons by first-class designers
We Love SVG - Google Fonts for Icons
illustrio: 100% free, 100% customizable icon library
Jam Icons / 890+ pixel perfect free icons
Streamline 3.0 - 30,000 free PNG icons
Manualicons - Photo & video editor icon set