Casual Tux is released under the same license as the original Tux.  The copyright holder of this file allows anyone to use it for any purpose, provided that the copyright holder is properly attributed. Redistribution, derivative work, commercial use, and all other use is permitted.

http://creativecommons.org/licenses/by/3.0/

Attribution:

* Tux was originally made by Larry Ewing in the Gimp

* and re-illustrated in scalable vector graphics (svg) by Simon Budig and Anja Gerwinsk.

* Casual Tux was created from the svg Tux by Troy Dawson, using Inkscape.