Apache Camel - Apache Camel is a versatile open-source integration framework based on known enterprise integration patterns.
MarkLogic - Schema-agnostic Enterprise NoSQL database technology, coupled w/ powerful search & flexible application services
Software AG webMethods - Software AG’s webMethods enables you to quickly integrate systems, partners, data, devices and SaaS applications
Apache Xerces - Advanced XML parser, including support for XML Schema, DOM Level 2, and SAX.
Azure Service Bus - Learn how to set up messaging that connects applications and services across on-premises and cloud environments. Tutorials, videos, API references, and more.
Apache Xalan - XML Databases