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	Category	Version	Status	Released	License	By
Internet Business Logic	Tool Ontology engineering tool Business Rule Ontology editor Ontology language Artificial Intelligence Query language Reasoner Semantic wiki	1.0	stable	30 April 2008	Webapp, free shared use, also commercial subscription	Reengineering LLC
JOWL	Tool Semantic browser Semantic search tool	1.0	beta	March 2009	MIT	Ontology Online
Jdbc4sparql	Tool Semantic Web development toolkit	1.0.0	stable	25 April 2011	MIT	Lexicater
Jena (toolkit)	Tool Semantic Web development toolkit RDF store	2.7.0	stable	December 2011	Apache License
Jena .NET	Tool RDF store Semantic Web development toolkit	0.2	beta	5 July 2010	BSD licenses
Jenabean	Tool Ontology engineering tool	1.0.6	beta	25 February 2010	Apache 2.0	Jenabean Project
KAON2	Tool Reasoner		inactive	29 June 2008	Pay Licensed Closed Source	University of Manchester FZI AIFB
KAON2 OWL tools	Tool Ontology engineering tool	0.27	beta	7 June 2006	BSD licenses	AIFB
KAONP2P	Tool Reasoner		unknown	19 July 2006		AIFB
KOMMA	Tool Ontology editor Semantic Web development toolkit		beta		Eclipse Public License	Fraunhofer IWU
Karagabi KMFramework	Tool Semantic Web tool Semantic Web development	2.0.0	stable	28 May 2010	Comercial, GPL	TOTEMS Ltda Software Engineering Research Group (IDIS), Cauca University
Kaukolu	Semantic wiki engine Semantic wiki
KendraBase	Tool Semantic wiki engine Semantic wiki		inactive
KiWi	Tool Semantic annotation tool Semantic wiki engine Semantic wiki Topic semantic wikis	1.0	stable	14 October 2010	BSD	KiWi Project
KnowWE	Tool Semantic annotation tool Semantic wiki engine Semantic wiki Topic semantic wikis	2.0	inactive	1 October 2008	LGPL	University of Würzburg
Knowee	Tool Semantic PIM	0.1.1	alpha	10 January 2009	W3C License	Semsol
Krextor	Tool Conversion Tools	0.3	beta	18 December 2008	LGPL	Jacobs University Bremen
LDIF	Tool Semantic Web tool Linked Data	0.5	stable	28 March 2012	Apache License, Version 2.0	Free University Berlin
Linked Ratpack	Tool Semantic Web development toolkit	0.0.1	beta	31 July 2011	Apache License
LinkedMediaFramework	Tool Linked Data RDF store RDF indexing service Semantic search tool Topic Linked Data	2.0rc2	stable	30 May 2010	BSD	Salzburg Research
Longwell	Tool Semantic browser RDF store	2.5.5	beta	29 October 2007	BSD licenses	Simile
Makna	Tool Semantic wiki engine Semantic wiki		unknown
MashQL	Tool Mashup Query language Semantic browser Semantic Web tool		unknown
MetaGlance	Tool Automated Metadata Generator Web Service Metadata Extractor Classifier Semantic Web tool	1.0		20 April 2010		Eduworks
Mulgara	Tool RDF store	2.1.7	unknown	16 February 2010	Open Software License 3.0	Mulgara Project
MyOntology	Tool Ontology editor		prototype		LGPL	University of Innsbruck, STI Innsbruck
NeOn Toolkit	Tool Ontology editor	2.4.2	stable	5 March 2011	EPL	NeOn Project
Neologism	Tool Ontology editor		beta		GPL	DERI Galway
OWL API	Tool Semantic Web development toolkit	3.2.4	stable	22 July 2011	LGPL	University of Manchester
OWL-S Editor	Tool Ontology editor		unknown	6 September 2006	Mozilla Public License 1.1
OWL-S UDDI Matchmaker	Tool Semantic Web tool		unknown			Carnegie Mellon University
OWLDiff	Tool Ontology engineering tool	0.1.4	beta	30 March 2010	LGPL	Czech Technical University, Prague
OWLGrEd	Tool Ontology editor	1.0	stable	6 June 2011	Free	Institute of Mathematics and Computer Science, University of Latvia
OWLIM	Tool Reasoner RDF store	4.3	stable	4 November 2011		Ontotext
Onthology	Tool Ontology engineering tool		unknown			OntoWare
OntoStudio	Tool Ontology editor		unknown		Pay Licensed Closed Source	Ontoprise
OntoVCS	Tool Semantic Web development toolkit	1.3	beta	5 November 2011
OntoWiki	Tool Semantic wiki engine Semantic wiki	0.9.5	stable	14 June 2010	GPL
OpenLink AJAX Toolkit	Tool Semantic Web tool Semantic browser Semantic search tool Meshup	2.8	stable	20 March 2009		OpenLink Software
OpenLink Data Explorer	Tool Semantic Web tool Semantic browser Semantic search tool Meshup	0.26	stable	27 June 2009		OpenLink Software
OpenLink Data Spaces	Tool Semantic content management system Semantic wiki Social Semantic Network		stable	28 March 2008	GPL Commercial	OpenLink Software
OpenSaharaSesame	Tool RDF store RDF indexing service	0.3	beta	7 March 2011	Apache 2.0	Open Sahara
Orient	Tool Ontology engineering tool		unknown		OSI Approved
Oroboro	Tool Semantic Web development toolkit Reasoner	0.6	beta	10 March 2011	GPL
Owlgres	Tool Reasoner	0.1	alpha	7 May 2008	AGPL	Clark & Parsia
Oyster	Tool Ontology engineering tool		unknown			OntoWare
Paggr	Tool Semantic Web tool		beta			Semsol
Paux	Tool Semantic wiki engine Semantic wiki
Pellet	Tool Reasoner	2.3.0	stable	22 August 2011	Dual license: AGPL v.3.0 & proprietary	Clark & Parsia LLC
Piggy Bank	Tool Semantic annotation tool Semantic browser	3.1	beta	4 September 2007	BSD licenses	Simile