SDB - A SPARQL Database for Jena. SDB - persistent triple stores using relational databases SDB uses an SQL database for the storage and query of RDF data.
Many databases are supported, both Open Source and proprietary. An SDB store can be accessed and managed with the provided command line scripts and via the Jena API. Use of SDB for new applications is not recommended. This component is "maintenance only". Jena Semantic Web Framework. Arbor.js » reference. About arbor Arbor is a graph visualization library built with web workers and jQuery.
Rather than trying to be an all-encompassing framework, arbor provides an efficient, force-directed layout algorithm plus abstractions for graph organization and screen refresh handling. It leaves the actual screen-drawing to you.