CLIPS is a public domain software tool for building expert systems.
This image contains both 68k and PPC applications, documentation, examples and scripts.
It was extracted from the CD-ROM of an Expert Systems book some years ago, when I was at university. I don't remember the name of the book, as I borrowed it from a public library.
It needs 2MB RAM and the complete set of windows is optimized to be shown at 800x600 resolution. Tested at Basilisk II running System 7.5.5.