It has taken forever, but I have finally released the command-line version of this software, Copyfind.4.1.2. This software is still windows-based, meaning that it will only run under windows. However, it runs in a console window and reads its commands from the console input. That means it is scriptable — you can write a script-based program to do fancy comparisons between all sorts of collections of documents. It uses the same comparison engine as WCopyfind, but it is much more flexible than WCopyfind and can be used for serious research work.