Open Source Document Management and Revision Control?

Ramon M. Felciano asks: "I'm trying to scrape together our development intranet and want to be able to post specs, change reports, etc. that could be in Word, HTML, PDF, etc. Are there any intranet "shells" out there that include at least rudimentary document management facilities (like the ability to post files to a directory structure, receive notifications of new postings, and allow single-click-to-open-inline functionality, rather than download and then open). I've played with the idea of converting everything to PDF but there doesn't seem to be a way to automate this from the source format. Also, integration with CVS for version controlling these docs would be a nice bonus I checked Freshmeat but didn't see any good matches. The closest was Phorum and the other thread / discussion servers, but we don't really need discussion support. Any suggestions? "