Galaxy Funder is a Keep What You Raise Crowdfunding System built on top of WooCommerce and is rich in features. It is a WooCommerce Extension Plugin. Using Galaxy Funder you can run your own Crowdfunding site or add the Campaigns for Crowdfunding on top of your existing WooCommerce Shop

Demo: http://codecanyon.net/item/galaxy-funder-woocommerce-crowdfunding-system/7360954