Coolicons provides a free set which includes more than 440 icons to be used in Figma. SVG and webfont are also available on GitHub.
SVG & Font Icons
Latest sets of free icons available as SVG & Webfont
Iconly is a free set of essential 600+ icons for Figma, Sketch, Illustrator and Xd, brought to you by Piqo.
Unicons is a complete set of 1000+ free vector icons released by Iconscout. Icons are carefully crafted in 24px grid to have consistency on all displays.
Fontisto is a new iconic font including more than 360 pictographic icons and a CSS toolkit for customising icons aspect via CSS.
CSS Icon is a set including 100 free tiny and simple icons made with pure CSS to be copied and pasted, created and released by Wentin.
Bytesize is a free set of 75+ SVG icons that you can easily style adjusting the weight, colour, size, and if you want the edges to be round or square.
Stackicons is a free colourful icon font for the web. It includes over 60 up-to-date icons for modern social brands, from App.net to Zerply. It uses overlapping colours to create “multi-color” icons with a modern flat look. Created by Parker Bennett.
Using SVGs on websites is becoming more and more easy. Here is another great Codrops tutorial for creating nice animations with SVG icons.
Here is a CSS snippet for creating a set of social rhombus icons and a nice animation on mouseover. Free PSD and code by Marco Biedermann.
Here is a useful CSS3 snippet for creating some simple arrow icons and a loader. Code provided by eMaj.