This is a slightly modified and modernized fork of Rats! - a Java Packrat Parser generator - published by Robert Grim as part of his xtc (eXTensible Compiler) project.
Our code is based on version 2.4.0 (2014-08-17) of Rats!, which we have obtained from here. All changes made to this original codebase are listed in ChangeLog.txt. Both the original software and our modifications are licensed under a GPL2 License. For details see LICENSE.txt.