Font Awesome
Font Awesome is a font and icon toolkit based on CSS and Less. It was made by Dave Gandy for use with Bootstrap, and later was incorporated into the BootstrapCDN. Font Awesome has a 38% market share among those websites that use third-party font scripts on their platform, ranking it second place after Google Fonts.
Font Awesome 6 is the next version which is planned to release in the second half of 2020. This will allow people to upload their own icons and get more icons on top of the existing ones from Font Awesome 5.
Font Awesome 5 was released on December 7, 2017 with 1,278 icons. Version 5 comes in two packages: Font Awesome Free and the proprietary Font Awesome Pro. The free versions are available under the SIL Open Font License 1.1, Creative Commons Attribution 4.0, and MIT License.