MakeAppIcon - MakeAppIcon resizes and optimizes your icon designs into all formats needed for iOS and Android mobile app!
Pixel Icons - 6,500 unique icons designed for perfection 🚀
EasyAppIcon - EasyAppIcon helps you to create your own app icons easily. Supporting Android Adaptive Icon!
Streamline icons - The world’s largest icon pack library - 100k icons and illustrations.
Flat Icon Generator - Create stylish, flat icons for Android apps.
Feather Icons - Simply beautiful open source icons