public static function available_strategies_list() {
        $installed = core_component::get_plugin_list('workshopform');
        $forms = array();
        foreach ($installed as $strategy => $strategypath) {
            if (file_exists($strategypath . '/lib.php')) {
                $forms[$strategy] = get_string('pluginname', 'workshopform_' . $strategy);
            }
        }
        return $forms;
    }