X-Kaapi libraries and runtime are distributed under a CeCILL-C license
There are 2 ways to retrieve the sources:
The tarball of the last stable version of XKaapi is available here
You can also clone KAAPI git repository as follows.
$ git clone git://scm.gforge.inria.fr/kaapi/xkaapi.git
Examples of XKaapi are in the subdirectory xkaapi/examples. After the installation step they are in copied in <prefix>/shared/doc/xkaapi/examples.