Django, of course.

The syncvb command requires a set of ontology files originally distributed by the W3C, Dublin Core and a couple of other sources. The set can be downloaded as a tarball listed in the Featured Downloads call-out on the Google Code front page. The files are freely redistributable but distributed separately due to different licensing.

The SPARQL compiler depends on David Beazley's excellent PLY. On Mac OS X,

sudo port install py25-ply

and on any Debian-flavored Linux (including Ubuntu):

sudo apt-get install py25-ply

See also the License page.