PURLZ
The PURL Server is a Web server that is optimized to server URL redirects.

Callimachus
Callimachus is a Semantic Web framework for easily building hyperlinked Web applications. Callimachus allows Web authors to quickly and easily create Semantically-enabled Web applications with a minimal knowledge of Semantic Web principles.

OpenRDF
Community site to support the development of Sesame. Sesame is an open source framework for storing, inferencing and querying of RDF data.

Mulgara
Mulgara is a scalable RDF database written entirely in Java.

NetKernel
1060® NetKernel™ provides a development and computing environment that is simple in concept and far-reaching in implication. The NetKernel open source community is focused on learning how to leverage and extend the technology to a wide range of fields and applications.

Jersey
Jersey is the open source, production quality, JAX-RS (JSR 311) Reference Implementation for building RESTful Web services. But, it is also more than the Reference Implementation. Jersey provides an API so that developers may extend Jersey to suite their needs.