Font Awesome is a webfont used by websites designer & developers for icons instead of traditional old image icons. Its flexible in terms of coloring, sizing & stacking on top of other background styles using plain css.
"Icon Fonts have become essential tools for web design. RightFont comes preloaded with a stunning collection of free Icon Fonts, including Font Awesome, Google Material Icons, Typicons, Entypo+, and more. This collection will continue to expand in future updates."
Font Awesome is a collection of over 7,842 icons that can be used in websites or any design project. Version 6 is now available for pre-order. It includes all version 5 icons, more styles, custom CSS, plugins, and better performance.
Font Awesome Pro Duotone
Say hello to Duotone, a beautiful new icon style now available as part of Font Awesome Pro.