We choice open-source projects on the basis of the OpenSourceProjectSelectionCriteria.

Existing RDF Storages:

• Jena;
• Sesame2;
• Mulgara;
• Boca (project seems is suspended, see Open Anzo instead);
• YARS;
• Kowari (project was closed in 2005, see Mulgara instead);
• 3Store;
• Open Anzo;
• OWLIM.

See also SPARQLInterfaceSurvey.

Criteria Summary Table:

Our Choice:

• Sesame2 (is used by default, sesame2-rdf-store sandbox project);
• Jena (because, it has the old annoying graph model and some problems with scalability);
• Open Anzo (openanzo-rdf-store sandbox project);
• Mulgara (mulgara-rdf-store sandbox project).

Read the blog note about that decision.