A simple online RDF Turtle editor that allows you to render an RDF graph visually, restrict to sub-graphs via SPARQL and to export the visualisation as SVG.
A semantic web experiment with a focus on Ontology Visualisation and Querying. For an idea of what we are about:
Check out jOWL, a javascript library for traversing OWL-RDFS documents (under development).
Dig through the available Ontologies with the ontology Interface, find what you are looking for amidst the more than 70.000 information pages: