A large collection of glyph icons from a German artist. Free to use without attribution and free to modify.
The Noun Project
Thousands of glyph icons from different artists. Some icons are free and some for a fee.
FlatIcons.net is a free flat icon maker. You can create your own royalty free flat icons for your web-projects within seconds!
Simple and clean icon pack with the code to support Rails, Node.js, Grunt and more. Also available to download in SVG, AI and Sketch for designers. Evil Icons are completely free.
A search engine for 16000+ glyph vector icons. Includes a Photoshop plugin to insert icons directly into an artwork.
Material Icons by Google
Material icons are beautifully crafted, delightful, and easy to use in your web, Android, and iOS projects. Use them as Icon Font in your code or download in SVG or PNG.