iOS Icons - The first marketplace for custom iOS icon packs
Heroicons - Beautiful, free SVG icons from the makers of Tailwind CSS.
Cyberpunk Theme iOS 14 Icons - Handcrafted cyberpunk, futuristic, and sprawling icons!
App Icon Resizer - A service to resize your app icon to all needed resolutions
iForge - Create your own iOS icons
ResizePixel - Free image editor to crop, resize, flip, rotate and convert images online