Multivendor Multi seller/supplier Marketplace 
The Best Opencart Multi Vendor/seller Marketplace module will convert your Opencart store in to a Multivendor Marketplace with a wide range of functionalities such as separate seller/supplier product collection, separate seller/supplier with feedback support, and many other major additional features.
This module contains the custom shipping feature, where the sellers can add their own shipping rate according to the shipping region and weight of the product. Also, Multiple sellers can sell the same product with different prices, can upload products in bulk, and can even answer the questions of the customers regarding their products.
Marketplace Supports All templates and themes including Journal theme.
Opencart Multi Vendor module supports the Multi-Store feature of default Opencart.