well, I'd say www.htdig.org for the htdig spider... but you said no database access.
So that means you better start rolling up your sleeves.
I assume you don't have root on your server.
So that means you're stuck with fsockopen or plain ol' fopen()
Hopefully you have cronTab atleast, or you're really screwed.
Personally, I'd forget it on your current host situation... get a real host with root, install MySQL and make a nice colorfull installation of PHP for yourself.
...but hey...
You can always try.
But, I'd suggest you don't for sanities sake.
I mean think about what you are proposing.