Feather
Feather is a collection of simply beautiful open source icons. Each icon is designed on a 24×24 grid with an emphasis on simplicity, consistency and usability.
At its core, Feather is a collection of SVG files. This means that you can use Feather icons in all the same ways you can use SVGs (e.g. img, background-image, inline, object, embed, iframe).
Related Tools
SVG Icons by Sparkk
Free, ready to use SVG icons for the web. All icon sets are from free Dribbble shots with the original link so you could download them.
IcoMoon
The IcoMoon app lets you build and use your own icon packs in many different formats including SVG, Polymer, PDF, XAML, CSH, icon font with ligatures, or good old PNG/CSS sprites.
IconSVG
ICONSVG is a tool to simplify the process of finding and generating common icons for your project. You can even modify each icon’s thickness, joins and ends.
Zondicons
A set of free premium SVG icons for you to use on your digital products, created by Steve Schoger.