RDFox is a highly scalable in-memory RDF triple store that supports shared memory parallel datalog reasoning. It is a cross-platform software written in C++ that comes with a Java wrapper allowing for an easy integration with any Java-based solution. It is available on Mac, Windows, and Linux.
After the initial development at University of Oxford, the system is currently being developed as a commercial product by a startup called Oxford Semantic Technologies. For users in academia, RDFox can be used under a noncommercial academic license. Please contact Mary Catherine DiNunzio (firstname.lastname@example.org) to obtain the license and the binaries.