code/Debug/Helper/Config.php
public function getModules()
    {
        $items = array();
        $items[] = array(
            'module'   => 'Magento',
            'codePool' => 'core',
            'active'   => true,
            'version'  => $this->getMagentoVersion()
        );

        $modulesConfig = Mage::getConfig()->getModuleConfig();
        foreach ($modulesConfig as $node) {
            foreach ($node as $module => $data) {
                $items[] = array(
                    'module'   => $module,
                    'codePool' => (string)$data->codePool,
                    'active'   => $data->active == 'true',
                    'version'  => (string)$data->version
                );
            }
        }

        return $items;
    }
public function getModules()
    {
        $items = array();
        $items[] = array(
            'module'   => 'Magento',
            'codePool' => 'core',
            'active'   => true,
            'version'  => $this->getMagentoVersion()
        );

        $modulesConfig = Mage::getConfig()->getModuleConfig();
        foreach ($modulesConfig as $node) {
            foreach ($node as $module => $data) {
                $items[] = array(
                    'module'   => $module,
                    'codePool' => (string)$data->codePool,
                    'active'   => $data->active == 'true',
                    'version'  => (string)$data->version
                );
            }
        }

        return $items;
    }
Returns description for installed Magento modules

@return array