to [icon] is a repository of high-quality icons available to the public for free. Each series has at least 100 pixel-perfect icons designed to work together. to [icon] has 2500+ icons and continues to grow.
Over 2 million free icons in 400+ icon sets over 30 styles
Iconshock is an huge icon search engine with more than 2 million icons, most of them are SVG and you can edit them on the fly! All styles you can imagine are covered, from linear to 3D realistic.