http://www.pscustomizer.com/ is a very useful PeopleSoft web site with lot of useful information. One of my favourite is the page page which lists most of the frequently used PeopleTools meta tables. Somehow this web site is no longer be found on the internet (may be they are revamping the site :-) ).
So, if someone wants to access the web site particularly PeopleTools meta table page you can find a cached copy of this web site from this link