Free site content and software means, roughly, that you are free to study what it does, free to change it, free to redistribute it, and free to publish improved versions. (See http://www.gnu.org/philosophy/free-sw.html for more details.)
Permission is granted to copy, distribute and/or modify the style and/or content available on this web site under the terms of the GNU Free Documentation License, Version 1.1 or any later version published by the Free Software Foundation with no Invariant Sections, no Front-Cover Texts, and no Back-Cover Texts.
Permission is granted to copy, distribute and/or modify the source code available from this web site under the terms of the GNU Lesser General Public License, Version 2.1 or any later version published by the Free Software Foundation with no Invariant Sections, no Front-Cover Texts, and no Back-Cover Texts.