OpenLink Virtuoso Universal Server (Commercial Edition) for Windows

Virtuoso is an innovative enterprise grade server that cost-effectively delivers an unrivaled platform for Data Access, Integration and Management. Its functionality realms include: Hybrid Data Server for Relational, RDF-Graph, and Document (Full Text) data management. Virtual Database Engine that enables powerful data virtualization atop heterogeneous data sources (SQL, RDF, XML, and Web Services). Web Application Services for deploying message oriented (REST) or RPC (SOAP) styles of distributed applications. Linked Data Server for deploying structured hypermedia resources comprised of Linked Data Object meshes across public or private HTTP based networks. Social Media enhanced Distributed Collaboration Services for effectively integrating Blogs, Wikis, Bookmarks, Feeds, and Discussion Forums.