Standards, document, text, hypertext guy. Linguistics, NLP, CS.
Worked on XML, TEI, Open Ebook, EAD, XPath, Xlink, XPointer, OSIS, etc.
Various utilities are available on my website under http://www.derose.net/steve/utilities (Creative Commons Attribution - Share Alike license). Most are in Perl or Python, and many have to do with XML and many other data formats; text and natural language processing, and corpus linguistics. Several are clones of standard *nix filters, but with fixes such as being able to handle Unicode, a much wider variety of CSV-ish formats, etc.
No guarantees, but I use most of them heavily myself, and I wrote them because I thought the functionality proved useful.