OpenCart - A free shopping cart system. OpenCart is an open source PHP-based online e-commerce solution.s
Piwigo.org - Manage your photo collection with Piwigo. Piwigo is open source photo gallery software for the web. Designed for organisations, teams and individuals.
Gumroad - An all-in-one solution to sell your work and grow your audience.
novaGallery.org - Beautiful php image gallery - easy to use, with modern responsive design, private mode, themes, languages
Sellfy - Sellfy is an easy to use but powerful e-commerce platform where you can sell digital, print on demand or subscription products. Use a Sellfy storefront to create a beautiful online store or embed a Sellfy shopping cart to your own website.
PhotoStructure - PhotoStructure is a complete photo and video management application designed for the whole family.