You might want to look into: Ixsite Web Analyzer http://www.ixacta.com/products/ixsite/ eValid http://www.soft.com/eValid/ report example page http://www.soft.com/eValid/Promotion/3DSiteMaps/examples.html#examples Andrew > I'm looking for software -- either hosted or downloadable -- that will > spider a site and create a tree-diagram of linked sites. > > I'd specifically like to be able to use it on very large sites, so its > display would have to scale quite well. I don't care if pages are > represented by tiny little squares.