FeedbackSpark's answer:
Range of powerful features designed specifically for digital product teams:
PrestaShop - Create your online store with PrestaShop's free shopping cart software. Build an ecommerce website for free and start selling online with hundreds of powerful features.
Back Market - the refurbished (super) market
Magento - Magento is the eCommerce software and platform trusted by the world's leading brands. Grow your online business with Magento.
Tracksuit - Beautiful, always-on, and radically affordable brand tracking for modern consumer brands. Tracksuit is the new way to measure, understand and communicate the value of brand.
DuckSell - Sell your digital products on your own website
Survey Monkey - Create and publish online surveys in minutes, and view results graphically and in real time. SurveyMonkey provides free online questionnaire and survey software.