All text on this site is licensed under the Attribution 3.0 Unported (CC BY 3.0) license. That means you are allowed to copy and redistribute the material in any medium or format, including any changes you want to make, for any purpose, even commercially, as long as you give appropriate credit, provide a link to the license, and indicate if changes were made.
Every script used on this site is served locally (not through a third-party CDN) and has a free and open source license. Below you'll find a table listing each script, its license, and a link to its unminified source code.
Note: the Expat license is often called the "MIT License."