MacOSicons.com - Free 5000+ macOS app icons in the style of macOS Monterey, Big Sur. Fully open source and community led. How to install custom icons on macOS Monterey, Big Sur.
Glim Flat Icon Pack - Hundreds of free icons in SVG, PSD, PNG, EPS format or as webfonts
Replacicon - Just updated to macOS Big Sur? You may have noticed some of the apps in your Dock look a bit inconsistent with the rest of the system.
ELEGANCE UI Icon Pack - Elegance Ui Icon Pack free download, and many more programs
IcoFX - IcoFX is an all-in-one solution for icon creation, extraction and editing.
CandyCons - CandyCons is an icon pack app that follows Google’s material design for building its icons.