https://fortawesome.github.io/Font-Awesome/license/

Font License

    Applies to all desktop and webfont files in the following directory: font-awesome/fonts/.
    License: SIL OFL 1.1
    URL: http://scripts.sil.org/OFL

Code License

    Applies to all CSS and LESS files in the following directories: font-awesome/css/, font-awesome/less/, and font-awesome/scss/.
    License: MIT License
    URL: http://opensource.org/licenses/mit-license.html