Sharetribe - Build your online marketplace business. You don't need a developer.
Sendlane - Marketing automation and campaign management solution
Arcadier - Build an online marketplace in minutes, no coding required.
CS-Cart Multi-Vendor - On-premises eCommerce marketplace builder
Shopify - Shopify is a powerful ecommerce platform that includes everything you need to create an online store and sell online. Try it free for 14 days.
SmartEngage - Cross-channel autoresponder for marketing automation