iconfont
A comprehensive platform offering millions of free and premium vector icons for designers, with support for multiple formats and easy customization.
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Iconfinder
Has a huge collection of icons, illustrations, and 3D illustrations.
Flaticon
A large database of icons in various formats, including SVG and PNG.
The Noun Project
Offers a vast collection of icons, including diverse and inclusive options.
Font Awesome
A popular icon library providing scalable vector icons customizable with CSS.