From the OpenSource Java site:

From the site:

The Semantic Web Client Library represents the complete Semantic Web as a single RDF graph. The library enables applications to query this global graph using SPARQL- and find(SPO) queries. To answer queries, the library dynamically retrieves information from the Semantic Web by dereferencing HTTP URIs and by following rdfs:seeAlso links. The library is written in Java and is based on the Jena framework.

Drools is probably the leading Open Source Java rule engine and rule management environment. It is the community version of commercial JBoss Rules. The whole operation os very solid - the Drools/JBoss Rules User Guide is among the best of any business rules product, either open source or commercial.

The following is a heavily paraphrased version of the three main points on Drools site:

March 29 2009: created

I just noticed that I didn't have a proper links page for Java ... hmmmm.

I think I need to readjust my attitude toward the Enterprise-Level Big Java applications encountered in the yesteryear of flaming youth and get up to date with the open-sourced/open-licensed small java applications of today. One must try to keep up with the times after all ... I like to think of it as being chronologically enhanced. :-)

Feb 3 2009: reflections on the power of modern marketing in selecting rule engines.

Sun appears to be serious about open sourcing the Java Development Kit and Virtual Machine, so it is time to consider Java as an environment for implementing Open Source rule and inference engines.

As an interpreted language, the performance and resource consumption of client and server-side solutions will probably be a critical design factor, particularly as Java-based rule engines tend to aspire to enterprise-level applications.

OntoGrid provides a technical infrastructure for the rapid prototyping and development of knowledge-intensive services for the Semantic Grid.

Feb 17 2009: cheap servlet hosting ?
Feb 5 2009: more links to applet demos

A few ill-formed thoughts so far ...

Java is The Enterprise Language. Most Java applications are not applications so much as pieces in the jigsaw puzzle of the enterprise integration architecture. In short, they are big, complex and expensive.

Updated Sept 16 2008: Note that this is not a complete list of Java workflow applications, just the ones that I have found and interest me.

Of the 702 Semantic Web tools listed in Mike Bergman's masterlist, 332 are implmented in Java .... and Java now being a fully open source and open licence language ...

Stray link I'll find a home for: http://www.daml.org/tools/

SWCL - Semantic Web Client Library: