Test Your IQ a WordPress Plugin for determining visitor’s IQ. The plugin has the optional PayPal payment gateway and everyone can pay after the test completing a fee chosen by you in a chosen currency (can be set easily). After payment, the user is redirected directly to his/her result and all wrong answers are displayed to him/her. Is easy to set and the plugin is tested always on the latest WordPress version and it can be translated into any language. All tests are stored in a database, there is also visible which tests were paid and which are not finished.
Demo: codecanyon.net
