Prestashop together with Thirty Bees is a PHP based webshop system widely used by many webshop owners.
Modules
Multi store and marketplace: https://www.knowband.com/prestashop-free-marketplace-modules
Prestashop together with Thirty Bees is a PHP based webshop system widely used by many webshop owners.
Multi store and marketplace: https://www.knowband.com/prestashop-free-marketplace-modules
As a drupal fanboy I like Drupal Commerce, but there are many others out there.
https://github.com/drupalcommerce/demo-project
Default theme: https://www.drupal.org/project/belgrade
Read more about how to install Drupal Commerce.
Wordpress commerce.