I've been meaning to make the source code for the Redland demos fully available for several years(!) - RDF database, RSS 1.0 validator, N-Triples validator and the old parser test demo.
This required some cleanups for removing ILRT HTML style and private configuration, but now I've got that done so each of the demos now links to it's source code in the Redland demos CVS area and the demo sources are shipped with the Redland distributions. These are still running with the 0.9.11 API so I still need to update them for the stream/iterator changes.