ZentesterJoomla is a project mainly written in PHP, it's free.
Zentester Joomla Plugin
This is the Zentester for Joomla plugin, allowing users to easily use Zentester alongside Joomla.
plugin_zentester4joomla is for Joomla V1.5 plugin_zentester4joomla16 is for Joomla V1.6 / V1.7