QSvn is a graphical Subversion client for Linux, Windows and Mac OS X. 

QSvn is released under the terms of the GNU GENERAL PUBLIC LICENSE Version 2, June 1991. 
The License you found in the file licenses/COPYING.
Parts of the binary distribution are released under different license. You found all of them in the licenses folder.

More Information about QSvn you will find at http://www.anrichter.net/projects/qsvn/