Harmap 2.2 is available for free here
Harmap is written in Java. It works on Windows, Mac OS and Linux. You must have Java Runtime Environment installed. See http://www.java.com.
Harmap 2.3 is available. With Harmap 2.3 comes a new way to install. If you have already installed the Java Runtime Environment, you just have to click on the link above. (A window will appear and ask for approval. ) here
Harmap 1 is available for free here