Following on from my earlier post Linking taxonomic names to literature: beyond digitised 5×3 index cards I've been slowly updating my latest toy: http://iphylo.org/~rpage/itaxon This site displays a database mapping over 200,000 animal names to the primary literature, using a mix of identifiers (DOIs, Handles, PubMed, URLs) as well as links to freely available PDFs where they are available.