- There are other tools:
						- RDFSuite: another Java environment (from ICS-FORTH)
- RDFStore: RDF Framework for Perl
- Redland: RDF Framework with bindings to C, C++, C#, …
- RAP: RDF Framework for PHP
- SWI-Prolog: RDF Framework for Prolog
- …
- Sesame: Java based storage and query for RDF and RDFS
- 
              Kowari, 
							    Tucana, 
								 Gateway: triple based database systems
								- they may have Jena interfaces, too
 
- etc.
 
- You can always start by:
- 
          
            http://www.w3.org/RDF/#developers