WSO2 API Manager - WSO2 API Manager is a 100% open source enterprise-class solution that supports API publishing, lifecycle management, application development, access control, rate limiting and analytics in one cleanly integrated system.
CData Arc - Secure Data Integration & Managed File Transfer (MFT)
Fusio - Open source API management platform
eBridge Connections - eBridge Connections provides cloud-based accounting integration with EDI, eCommerce & CRM applications.
apiman - Open source API management
Mulesoft EDI - Mulesoft EDI is a solution from Mulesoft that provides tools for businesses and e-commerce platforms to create B2B communication.