Does anyone know of a good library for mapping a person's name to his or her gender? [closed]

Answer 1

It's not a service, but a little app with a database:
http://www.codeproject.com/KB/cpp/genderizer.aspx

And this tool is in german:
http://www.faq-o-matic.net/2011/06/01/zu-einem-vornamen-das-geschlecht-finden/

And another one in VB:
http://www.vbarchiv.net/tipps/tipp_1925-geschlecht-anhand-des-vornamens-ermitteln.html

I think in combination with some "Most used firstname in 2011" lists you should be able to build something decent.