iOS Icons - The first marketplace for custom iOS icon packs
Radix Icons - A crisp set of 15×15 icons. Open source.
System 1 iOS 14 Icons - Bring your iPhone back to the good old days
MakeAppIcon - MakeAppIcon resizes and optimizes your icon designs into all formats needed for iOS and Android mobile app!
Fluo - Alternative home screen icons
Ayecon - Ayecon is an app that allows you to easily make icons according to the required dimensions.