A tool for extracting and translating between rdfa, microdata, n3, nt, xml, rdf-json, trix, and pretty versions of some of the above (if you’re intending to read it).
Uglify contains an Abstract Syntax Tree, so anyone interested in doing any language parsing JS tools or projects might like to give it a look.
So what next fo XML? Some useful thoughts on the design decisins that hamstrung XML and how a break from SGML and rigorous syntax may be desirable.
Library for prettifying code. Nice.
Talis’ take on representing RDF in JSON. Still a couple of open issues, but a good basic and minimal representation.
Use bespin on any page that has a text area that you’d normally enter html or javascript into.
A frame-based syntax for OWL2 ontologies.