IconStore - Free icon packs by first-class designers
omg-img - Insert icons directly into your HTML just by coding
Feather Icons - Simply beautiful open source icons
Mosaic - Mosaic provides brands with solutions to store and categorize their digital graphic and photography files for quick and easy retrieval.
Noun Project for Mac - Search nearly a million icons. Now in color!
Free Icon Pack by ThemeIsle - Minimalist design, multiple formats. Free to download.🎅