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.
The OWL API is a Java API and reference implmentation for creating, manipulating and serialising OWL Ontologies. The latest version of the API is focused towards OWL 2
The SEALS Community is a worldwide group of individuals and organizations interested in the evaluation of semantic technologies.
This community will give semantic tool researchers, vendors and users the opportunity to participate in tool evaluations, as well as find and exchange evaluation opinions, materials and results that support their technology evaluation and selection activities.
J. Attard, S. Scerri, I. Rivera, и S. Handschuh. Proceedings of the 9th International Conference on Semantic Systems, стр. 113--120. New York, NY, USA, ACM, (2013)