DB2 Graph Store is an optimized way to store graph triples inside DB2 database. Support for the SPARQL query language
Support for popular RDF Java APIs like JENA
Support for HTTP SPARQL end-point via JOSEKI
SparQLed is an interactive SPARQL editor that provides context-aware recommendations, helping users in formulating complex SPARQL queries across multiple heterogeneous data sources.
B. Elliott, E. Cheng, C. Thomas-Ogbuji, и Z. Ozsoyoglu. Proceedings of the 2009 International Database Engineering & Applications Symposium, стр. 31--42. New York, NY, USA, ACM, (2009)