Open Source EJB Servers

Modular EJB container; local and remote servers. Now part of Apache TomEE (Tomcat + OpenEJB); provides EJB 3. x and embedding API.

Community around JBoss middleware and Java EE. Application server lineage continued as WildFly; site hosts project news, blogs, and upstream posts.

Resin application server: JSP, Servlets, EJB; high-performance, clustering, SSL. Commercial and open source from Caucho.

Open source server runtime: Java EE / Jakarta EE libraries, Microprofile implementations, and OSGi. The Geronimo Application Server is no longer maintained; Apache TomEE is the recommended replacement.

Lightweight EJB3 container from ObjectWeb/OW2. Integrates with JOnAS and Tomcat; provides EJB 3. 0 runtime and embedding support.

J2EE application server in pure Java from the Huihoo (China) open source community. Standards-compliant server runtime.

Full J2EE/Java EE application server from ObjectWeb/OW2. Certified Java EE 5; supports EJBs, JMS, JTA, and web profile.

Lightweight, modular Java application server for embedding. Stateless and stateful session beans, distributed cached JDBC service, Jython-based configuration.