Until recently, there was a Java Applet on this page.
However, support for Java Applets is rapidly disappearing from browsers.
So, in order to keep this software available, it has been re-packaged as
a Java Web Start application.
Simply click the link below to launch this software.
(You may need to install the Java Runtime on your device first.)
Main article: tc.catseye.whothm
Note that there would normally be instructions displayed here.
They are not currently available due to maintenance work on the website structure.
However, you can still go to the Instructions article
and look for the instructions there, if you like.