- Kaon2
- formsPlayer XForms processor
- Jena – A Semantic Web Framework for Java
- ARQ is a query processor for Jena that implements SPARQL.
- SPARQL Query Language for RDF
- Web Ontology Language (OWL)
- 3Store: MySQL based triple store
- ANNIE - Open Source Information Extraction fact-file
- Adaptiva
- Amilcare
- Aqua
- eServices
- WebOnto
- Refiner++
- OntoPortal
- Knowledge Broker
- BuddySpace
- CS AKTiveSpace
- Swoogle
- DAML Ontology Library
- SchemaWeb Ontology Library
- Semantic Radar for Firefox
- Mondrian
- Altova SemanticWorks™ 2007 is the groundbreaking RDF and OWL editor for the Semantic Web.
- openkapow
- Opera
- Versavant
- ARC - RDF and SPARQL for PHP developers
- Xcerpt - Rule-Based Querying and Reasoning on the (Semantic) Web
- Joseki - A SPARQL Server for Jena
- Jena Semantic Web Framework
- Exposé
- OntoBroker
- OntoStudio
- SemanticMiner
- SemanticGuide for ServiceManagement
- SemanticIntegrator