The FireflyShell source code is distributed under the terms of the GNU
General Public License Version 2 as published by the Free Software
Foundation. You can find a copy of this license in the
admin-root/gpl-license.txt file.

This program uses the Microsoft Windows Template Library which is released 
under the Common Public License. The copyright holders of FireflyShell 
explicitly grant the additional right to distribute binaries produced from 
source code derived from FireflyShell that are linked with the Microsoft 
Windows Template Library.

Note that you may not be able to incorporate third party GNU General Public 
Licensed code into FireflyShell and then distribute binaries unless you have 
a similar additional right from the copyright holder.

You can find the Windows Template Library at
http://sourceforge.net/projects/wtl/