Darling is licensed under the GNU General Public License version 3 or newer.
Copyright © 2012 Luboš Doležel
Copyright © 2011 Shinichiro Hamaji
The projects includes header files covered by the Apple Public Software License, Copyright © Apple Inc.
Currently, the only way to get the source code is to check out the Git repository.
You can browse the sources on Github.
git clone --recursive git://github.com/LubosD/darling.git