Redland
Redland RDF Application Framework
Modular, object based libraries written in C
APIs for manipulating the RDF graph, triples, URIs and Literals.
Efficient streaming
RDF/XML, N-triples, Turtle parsers / serializers
Storage interfaces (memory, Sleepycat, MySQL, AKT Triplestore)
RDQL (SPARQL) query interface
Language bindings in C#, Java, Obj-C, Perl, Python, Ruby, TCL
Portable and Fast