Multi-Vendor On-Premises is a self-hosted marketplace builder that allows entrepreneurs to start large marketplaces and scale them easily. Comes with over 500 features, open source code and 1,700 live cases worldwide.
Dittofi Marketplace Solution - Build a custom marketplace in under 24 hours.
Listmonk - Send e-mail campaigns from a powerful dashboard. High performance and features packed into one app.
SmartEngage - Cross-channel autoresponder for marketing automation
Mailman - Mailman is free software for managing electronic mail discussion and e-newsletter lists.
Sharetribe - Build your online marketplace business. You don't need a developer.
Sendy - Sendy is a self hosted newsletter app that sends emails 100x cheaper via Amazon SES