Icon fonts have become a popular choice for web designers as they provide scalable vector icons that are easy to customize and use. They allow designers to add icons to their website without increasing the page load time, as they are typically smaller in file size than traditional image files.
Here are some popular icon font libraries that web designers can use for free:
Fontawesome
https://fontawesome.com/icons?d=gallery&m=free
Meteocons (40 Icons)
http://www.alessioatzeni.com/meteocons/
Weather Icon Font
http://erikflowers.github.io/weather-icons/
Map Icons
Infinity Space Icon Font
https://www.behance.net/gallery/12721009/Infinity-Space-Icons
LineAwesome
https://icons8.com/line-awesome
Linea Iconset
Themify Icons
https://themify.me/themify-icons
GitHub’s Octicons
Devicon
http://konpa.github.io/devicon/
iOS7 Vector Icons
http://streamlineicons.com/free-icons.html
Genericons
Stroke 7 Icon Font
http://themes-pixeden.com/font-demos/7-stroke/index.html
Devicons
http://vorillaz.github.io/devicons/#/dafont
Tonicons Outline Icons
https://www.tonicons.com/outline-icon-free-font/
The Elegant Icon Font
https://www.elegantthemes.com/blog/resources/elegant-icon-font