Apache Geronimo

Apache Geronimo is an open-source application server that supports Java EE (Enterprise Edition) technologies, enabling developers to build and deploy robust web applications. Think of it as a framework that helps manage server-side processes, allowing multiple users to access an application simultaneously. Geronimo can run on various operating systems and is customizable to meet specific project needs. Being open-source means it's free to use and can be modified by anyone, fostering a collaborative environment for improvement and innovation in enterprise software development.