Sendlane - Marketing automation and campaign management solution
Sharetribe - Build your online marketplace business. You don't need a developer.
VipeCloud - Forecast Automation. Sales, Pipeline, and Campaigns all in one product - a CRM replacement.
Arcadier - Build an online marketplace in minutes, no coding required.
CS-Cart Multi-Vendor - On-premises eCommerce marketplace builder
Kreezalid - Marketplace building solution for small to midsize firms