Semantic Web Reference Card

Via Semantic Web Mailing List:

To commemorate the Fourth International Semantic Web Conference, we've issued a special ISWC edition (v2.0) of the UMBC Semantic Web Reference Card. [...] Intended as a handy "cheat sheet" for researchers and developers [...]

It includes the RDF/RDFS/OWL vocabulary, SPARQL language reference and more. It can be downloaded here.
Very nice, I already printed mine :-)