Drool, David's Reworked Object-Oriented Language version 0.9 - the successor to AdvSys.
This is David Betz' article "Play It Again, Sam" from the October 1993 issue of Dr. Dobb's Journal and all the code to run the examples from the article. MacBinary format.
All the files from Drool.sit.bin that non-Mac users can make use of.