These are some of the open source (or similar) tools that this website depends on

Typography

• Source Sans: Typeface owned by Adobe and distributed under the SIL Open Font License Version 1.1
• FontAwesome: Icon typeface distributed under several open licenses
• fontTools: Python library for manipulating fonts, distributed under an MIT open-source license

Mechanics

• jQuery: JavaScrip library distributed under the MIT License
• smartquotes.js: JavaScript for updating directionless quotes distributed under the MIT license
• clipboard.js: JavaScript for copying data to clipboard distributed under the MIT license

Build system

• Node.js: Asynchronous JavaScript runtime with associated package management, distributed under a minimally restrictive license
• grunt.js: JavaScript task runner distributed under a minimally restrictive license
• Sass: CSS extension language distributed under the MIT license