Framework & GUI for Bayes Nets and other probabilistic models.
Java library which offers information contained in an OWL resource
a Domain Ontology rapiD DeveLopment Environment – OWL extension
Natural Language Processing (NLP) for the Masses
A Java API for measuring OWL ontologies
Another free OWL/DL Reasoner
RSS Owl is a powerful application to organize, search and read feeds.
OntoComP is a Protégé 4 plug-in for completing OWL ontologies
Semantic Web Entailment Regime Translation and Inference Architecture
Open source Search Engine and Enterprise Search