I put on this page all the external resources that I've used on this website. Check the licence, they can be not under GPL3 which is only for the source code.
I use the default browser's font.
GIF drawn by VioletCross (all rights reserved, but it's my furso). The original (264kB).
The Glider comes from catb website.
The links on the buttons are often websites where I found them.