The Emacs package ANTLR-Mode provides: syntax highlighting for ANTLR grammar
files, automatic indentation, menus containing rule/token definitions and
supported options and various other things like running ANTLR from within
Emacs.
Lisa is a production rule system for Common Lisp, whose purpose is to provide a foundation for the development of "intelligent" applications. Lisa employs a modern CLOS implementation of Rete and is based on CLIPS and Jess.
JLisa, \"Java Lisp-based Intelligent Software Agents\", is based on Lisa, http://lisa.sourceforge.net/, a production rule system similar to Jess. It runs in java through ABL, armed-bear Lisp, http://www.armedbear.org.