Due to the urging of friends I finally put my source for FAWCET, my web engine I developed a year and a half ago online. I doubt many will have much they can do with this 'cause it's so old (built on PHP 4.0 and Mysql 3.23) but hopefully when I get some time I'll start bringing the source back up to speed and get some better documentation out.
Until then read the source. :)