iOS Icons - The first marketplace for custom iOS icon packs
MakeAppIcon - MakeAppIcon resizes and optimizes your icon designs into all formats needed for iOS and Android mobile app!
Meta Icons - Go beyond icons with meta icons for iOS 14
EasyAppIcon - EasyAppIcon helps you to create your own app icons easily. Supporting Android Adaptive Icon!
iOS icons converter - SVG -> PNGs for all app icon sizes, for free.
App Icon Maker - Create icons for mobile app stores online for free.