I worked with ArsDigita in 2000-2001, right at the cusp of the dotcom crash. I was tasked with ongoing development of the ArsDigita Community System (ACS), an open-source toolkit for the production of community websites, and use of the toolkit for the development of sites for business clients. In modern parlance, ACS could be considered the first web framework.
The bulk of ACS ran atop Oracle 8i using an extensive set of PL/SQL APIs. The presentation layer was implemented using AOLserver's embedded Tcl interpreter.
I was the developer assigned to the ACS Portal module, a content aggregation framework from the days before widespread RSS adoption. A former co-worker has been kind enough to keep an archive of the code online, so you can still find the source. Note, however, that the module wasn't ever finished. The company tried to grow too fast without a clear plan, and the rest is history.
I also did a bunch of work on the ArsDigita University website.