4,000 Vector Icons for IOS, Android and applications. “The world’s largest icon collection.”
vector
Retro Vectors
About those vector icons
The most comprehensive explanation as to why we still use raster icons instead of vector, and why SVG is not the answer.
Paper.js
A JavaScript vector graphics framework utilizing HTML5 Canvas. It has “a lot of powerful functionality to create and work with vector graphics and bezier curves, all neatly wrapped up in a well designed, consistent and clean programming interface.”
iconSweets 2
A free "icon set containing over a 1,000+ icons, all in a vector-shaped Photoshop format".
Freepik
A search engine for free photos and vector illustrations.