title: What program slicing tools actually exist?
body: <p>I've just been introduced to the term "program slicing."  It makes perfect sense that one would want such functionality, but does it exist anywhere?</p>
  
  <p>The term is 20 years old now, and I see there are lots of publications, research papers, etc.  But where are the actual tools?  Are people actually putting this concept into practice, or just studying it academically?</p>
  
  <p>What's out there, and for what languages?</p>
  
  <p>Edit: I guess what I'm looking for, what I'd reward as an Accepted answer, is a reference to some publication/organization/etc that's particularly geared towards program slicing and maintains a list of tools/techniques/etc.</p>