Font Awesome is a popular icon set and toolkit. Use it for scalable vector icons that can be customized with CSS.

https://cdnjs.cloudflare.com/ajax/libs/font-awesome/6.0.0-beta3/css/all.min.css

Material Icons are Google's icon set, designed for use in Android and web applications.

https://fonts.googleapis.com/icon?family=Material+Icons

Ionicons is an open-source icon set for use with Ionic Framework. It includes over 1,100 icons.

https://unpkg.com/ionicons@5.5.2/dist/css/ionicons.min.css

Bootstrap Icons are designed to work with Bootstrap but can be used in any project.

https://cdn.jsdelivr.net/npm/bootstrap-icons@1.5.0/font/bootstrap-icons.css

Octicons are GitHub’s icon set, designed for use in the GitHub interface and beyond.

https://cdnjs.cloudflare.com/ajax/libs/Octicons/8.5.0/font/octicons.css

Feather Icons are simply beautiful open-source icons that can be easily customized.

https://cdn.jsdelivr.net/npm/feather-icons/dist/feather.min.js

Line Awesome is a beautiful alternative to Font Awesome, providing outlined icons.

https://cdn.lineawesome.com/1.3.0/line-awesome.min.css

Remix Icon is a set of open-source neutral style system icons.

https://cdn.jsdelivr.net/npm/remixicon@2.5.0/fonts/remixicon.css

Simple Icons is a collection of free SVG icons for popular brands.

https://cdn.jsdelivr.net/npm/simple-icons@v4/icons.css

Typicons are a set of free-to-use vector icons embedded in a web font.

https://cdn.jsdelivr.net/npm/typicons.font@2.1.0/src/font/typicons.css

Weather Icons are a collection of icons for different weather conditions.

https://cdn.jsdelivr.net/npm/weather-icons@2.0.10/css/weather-icons.min.css

Zondicons is a set of free premium SVG icons designed for web applications.

https://cdn.jsdelivr.net/npm/zondicons@1.0.0/zondicons.min.css

Dashicons are the official icon font of the WordPress admin dashboard.

https://cdnjs.cloudflare.com/ajax/libs/dashicons/2.0.0/css/dashicons.min.css

Glyphicons are a set of icons included with Bootstrap 3.

https://maxcdn.bootstrapcdn.com/bootstrap/3.3.7/css/bootstrap-glyphicons.css

Picons is a free icon pack of over 800 icons in various styles.

https://cdn.jsdelivr.net/npm/picons@1.0.0/picons.css

Devicons is a set of icons for developers, with icons for over 100 different technologies.

https://cdn.jsdelivr.net/npm/devicons@1.8.0/css/devicons.min.css

Metrize Icons are a free icon set designed for use in web and mobile applications.

https://cdn.jsdelivr.net/npm/metrize-icons@1.0.0/css/metrize.css

Socicon is a set of social media icons designed for use in web applications.

https://cdn.jsdelivr.net/npm/socicon@3.0.1/css/socicon.min.css

Entypo is a set of pictograms designed for use in web and mobile applications.

https://cdn.jsdelivr.net/npm/entypo@1.0.0/css/entypo.css

Boxicons is a simple vector icons set carefully crafted for designers and developers.

https://cdn.jsdelivr.net/npm/boxicons@2.0.0/css/boxicons.min.css

Akveo Icons is a comprehensive set of beautifully crafted icons for your applications.

https://cdn.jsdelivr.net/npm/@akveo/icons@1.0.0/css/akveo-icons.css

Clarity Icons is a set of open-source icons designed to provide clarity and clarity in your projects.

https://cdn.jsdelivr.net/npm/@clr/icons@3.0.0/clr-icons.min.css

SVG Box Icons is a set of SVG-based icons for use in modern web applications.

https://cdn.jsdelivr.net/npm/svg-box@1.0.0/icons.css