Fluid Templates ohne Extbase nutzen.

$renderer = t3lib_div::makeInstance('Tx_Fluid_View_TemplateView');
$renderer->setControllerContext(t3lib_div::makeInstance('Tx_Extbase_MVC_Controller_ControllerContext'));
$template = t3lib_extMgm::extPath(strtolower($this->extensionName)) . 'Resources/Private/...';
$renderer->setTemplatePathAndFilename($template);
$renderer->assign('helloworld', $helloworld);
$rendered = $renderer->render();

Quelle:

http://modi.de/2010/02/12/fluid-without-extbase/
http://de.slideshare.net/plobacher/typo3camp-2009-einfhrung-in-fluid