When you choose to use only free software we make a donation to the Trisquel project. By accessing the site through http://libre.thinkpenguin.com/ a cookie is set and all supporting documentation for non-free operating systems is disabled. No further non-free information will be shown no matter how you access the site.
What is Trisquel? Trisquel is a fully free operating system based on GNU/Linux and endorsed by the free software foundation. It is both easy to use, well maintained, and one of the few truly free distributions available.