You got it: http://drupal.org/project/hacked I've never used it though.

 
Nancy
Injustice anywhere is a threat to justice everywhere. -- Dr. Martin L. King, Jr.


From: Al Sessions

I recently came across a module that compares original code from
drupal.org to what is actually running on a given site.

In other words it tell you what modifications have been made to core.

I'm unable to recall the name and repeated drupal.org searches aren't
turning it up. Is anyone familiar with this module?