Listing pages under a page

Is there a way to list all the pages under a page?

What I mean is…

Say you create a page called “Blogging Tools”. Then you create another one called “WordPress”, and then under the option “Main Parent”, you choose “Blogging Tools”. Then you can create another page under “Blogging Tools”, let’s say “Movable Type”. And then you create another one… blah blah…

I hope you get what I’m saying.

Maybe a function like <?php get_pages_under(pageid); ?> …