This is a port of the smlsql (http://smlweb.cvs.sourceforge.net/viewvc/smlweb/smlsql/) PostgreSQL interface to MLton. It is mostly untested and possibly buggy, but it's a start. You need libpq installed. To get an idea of how to use it, take a look at pq-test.sml and the sql_driver/sql_client signatures.