Cocorico - Cocorico is a state-of-the art Open Source solution to create an Airbnb or Blablacar for anything.
JungleWorks Yelo - JungleWorks Yelo is software that helps you create a multi-vendor marketplace for your eCommerce business.
MarketplaceKit - MarketplaceKit is a platform for building different types of online marketplaces.
CS-cart - Secure and full-featured Online Shopping Cart Software with the complete set of powerful ecommerce options to create your own online store with minimum efforts involved.
Sharetribe - Build your online marketplace business. You don't need a developer.
WCFM Marketplace - WCFM Marketplace is a plugin made for WordPress that provides features for a multi-vendor marketplace platform.