Is there any tool which shows pages which were created and then deleted from the site? I'm looking for onsite and offsite tools, so to be able to check other sites for missing pages.
You could try the wayback machine at the internet archive - would only be useful if you knew the URLs you wanted to check.
I think I had one Wayback tool, can't find it now. Will http://validator.w3.org help me? Or examination of Google cached sites? It shows only one...