Simple Icons is an open source project that includes over 300 SVG icons for popular brands.

This project will be great for your next design when you want to add social or sharing icons. What is great is that it also includes icons for popular open source projects like Gulp, Vue.js, CodeIgniter, Laravel, Cake PHP, and more.

The repo claims a Creative Commons Zero v1.0 Universal license but I’d just be careful in the ways you use some of these since most logos are trademarked or copyrighted by the companies.