WSO2 Registry 1.0

The WSO2 Registry is a hub for managing data in a web-friendly and community-enabled way. It was built with enterprise metadata for SOA in mind, but really its up to you - the Registry can hold any kind of "stuff" including images, service descriptions, text files, office documents... and every resource you put in the Registry becomes a center for social activity.
Eschewing the complexity (and WS-* focus) of specs like UDDI, our Registry uses the Atom Publishing Protocol (via Apache Abdera) to offer a standard and RESTfully simple remote interface, which can be accessed easily by custom code, feed readers, and even browsers.
The Registry has been designed both to encourage "grass-roots" community around your data and also to allow for IT-friendly governance. A full feature list follows. We hope youll find many uses for it, and that youll share them with us as we work to make it even better.
-Storing and managing arbitrary resources and collections
-Tagging, commenting and rating
-Managing users and roles
-Authentication and authorization on all resources and actions
-Resource / collection versioning and rollback
-Advanced search capabilities - tags, users, etc.
-Built in media type support for common types (WSDL, XSD)
-Dependency management - maintain relationships between dependent resources
-Pluggable media type handlers for handling custom media types
-Support for processing custom URL patterns via pluggable URL handlers
-Support for custom query languages via pluggable query processors
-Activity log and filtering support for the activity logs
-Atom Publishing Protocol (APP) support for reading/writing the data store remotely
-Subscribe to directories, comments, tags, etc. with any standard feed reader (Bloglines, Google Reader, etc)
Java client for remote access via APP
Embedded and WAR deployments.