GNU Logo by Alvarojeda (http://commons.wikimedia.org/wiki/User:Alvarojeda) under a Creative Commons Attribution-Share Alike 3.0 Unported license (http://creativecommons.org/licenses/by-sa/3.0/deed.en)

The remaining artwork by kernel_script (www.kernel-script.deviantart.com) under a Creative Commons Attribution-Share Alike 3.0 Unported license (http://creativecommons.org/licenses/by-sa/3.0/deed.en)

Created with Inkscape
Resized in GIMP

Sizes:
1920x1080
1680x1050
1440x900
1024x576
SVG