IconStore - Free icon packs by first-class designers
Feather Icons - Simply beautiful open source icons
MakeAppIcon - MakeAppIcon resizes and optimizes your icon designs into all formats needed for iOS and Android mobile app!
Icons8 - Free app for Mac & Windows already containing 39,800 icons. Allows to search and import icons…
Iconoir - A diverse and open-source library with 900+ icons
Iconscout - Design Resource Marketplace.