This is great prestashop addon to create media gallery with voting feature. Module contains also feature to define voucher codes for pictures that customers will upload to your online store. This is one of the most popular and most advanced gallery module for prestashop
you can read more and download this prestashop addon here:
You can find there only valuable solutions for your e-commerce shop based on PrestaShop engine. Search the best plugin for your store that will meet your requirements and just use it.