PUBLIC MARKS with tags java & floss

Apache Lenya is an Open Source Java/XML Content Management System and comes with revision control, site management, scheduling, search, WYSIWYG editors, and workflow.

Jena is a Java framework for building Semantic Web applications. It provides a programmatic environment for RDF, RDFS and OWL, SPARQL and includes a rule-based inference engine. Jena is open source and grown out of work with the HP Labs Semantic Web Programme. The Jena Framework includes: * A RDF API * Reading and writing RDF in RDF/XML, N3 and N-Triples * An OWL API * In-memory and persistent storage * SPARQL query engine

OpenWFE is an Open source WorkFlow Engine, released under a BSD license. It's written in Java but features access libraries for languages such as Python, Perl, Ruby, C# (.NET), PHP and pnuts.

List of Java based workflow engines

Solr is an open source enterprise search server based on the Lucene Java search library, with XML/HTTP and JSON APIs, hit highlighting, faceted search, caching, replication, and a web administration interface. It runs in a Java servlet container such as Tomcat.

Aperture is a Java framework for extracting and querying full-text content and metadata from various information systems (e.g. file systems, web sites, mail boxes) and the file formats (e.g. documents, images) occurring in these systems.