This is a massively improved variant of the well-known Gartoon theme, used by e.g. Edubuntu. Some work may also be based on the Gnutoon/Ubuntoon variant by reassuringlyoffensive. The theme is released under GPL v2 or later.

In the context of GPL, "source code" is interpreted as the SVG versions of the icons; this means that if you distribute Gartoon Redux icons or any derivative versions of them, you have to provide the SVG versions.