A massive icon set provided by Smashicons, including 500 icons in 4 styles: flat, solid, outline and webby. The icons were designed on a 60px grid and look crisp and consistent on all kind of displays. The icon set is available in AI, PSD and Sketch formats and is covered by CC BY 4.0 license, which means you can use these icons in personal or commercial projects and customize them, no attribution required.