Apache Karaf - OSGi distribution for server-side applications

Karaf Container is a modern and polymorphic container. It's a lightweight, powerful, and enterprise ready container powered by OSGi. By polymorphic, it means that Karaf can host any kind of applications: OSGi, Spring, WAR, and much more. It uses either the Apache Felix or Eclipse Equinox OSGi frameworks, providing additional features on top of the framework.

Its feature include:

• Provides a complete Unix-like console where you can completely manage the container.
• Enterprise-ready container, providing many management indicators and operations via JMX.
• Provides a complete security framework (based on JAAS), and provides a RBAC (Role-Based Access Control) mechanism for console and JMX access.
• Embeds a SSH server allowing you to remotely access the shell using any SSH client.
• Directly drop your applications in the Karaf deploy folder, they will be directly deployed for you.