All content on this site is copyrighted by Lars Wirzenius and possibly other authors (it's a wiki), and licensed under a Creative Commons Attribution-Share Alike 3.0 Unported License.
A number of my projects are licensed under the GNU General Public License version 2 (GPL2). You can find a copy in the source tree, or here. Some projects are licensed under GPL2 or any later version, so you may want to see GPL3 as well.