Apache Jackrabbit is a fully conforming implementation of the Content Repository for Java Technology API (JCR, specified in JSR 170 and 283).
A content repository is a hierarchical content store with support for structured and unstructured content, full text search, versioning, transactions, observation, and more. Typical applications that use content repositories include content management, document management, and records management systems.
Take Apache Jackrabbit for a spin to see what it can actually do for you!

What's New in This Release:
New features:
· [JCR-2859] Make open scoped locks recoverable
· [JCR-2936] JMX Bindings for Jackrabbit
· [JCR-3005] Make it possible to get multiple nodes in one call via davex
· [JCR-3040] JMX Stats for the Session
· [JCR-3117] Stats for the PersistenceManager
· [JCR-3118] Configurable actions upon authorizable creation and removal
· [JCR-3124] Stats for Queries
· [JCR-3140] Add configurable hook for password validation
· [JCR-3154] Stats for Queries continued
· [JCR-3183] Add memory based bundle store
Improvements:
· [JCR-1443] Make JCAManagedConnectionFactory non final, so it can be extended
· [JCR-2798] JCAManagedConnectionFactory should chain cause exception
· [JCR-2887] Split PrivilegeRegistry in a per-session manager instance ...
· [JCR-2906] Multivalued property sorted by last/random value
· [JCR-2989] Support for embedded index aggregates
· [JCR-3017] Version history recovery fails in case a version does not ...
· [JCR-3030] Permit using different tablespaces for tables and indexes ...
· [...