MySQL - The world's most popular open source database
IBM App Connect - IBM App Connect is the all-in-one integration tool for connecting apps, integrating data, building APIs and acting on events
PostgreSQL - PostgreSQL is a powerful, open source object-relational database system.
Software AG webMethods - Software AG’s webMethods enables you to quickly integrate systems, partners, data, devices and SaaS applications
SQLite - SQLite Home Page
Apache Camel - Apache Camel is a versatile open-source integration framework based on known enterprise integration patterns.