iSmash code is based on some php libs like libphplay and libphtml. You can download them for php projects development.
You can download iSmash package under GNU General Public License version 3.0 (GPLv3) from sourceforge download area
Patches & updates
You don't need download libs to use iSmash. For use iSmash you can simply download iSmash package and install it. Download libs only if you want to develop iSmash or other php-based projects