tkri
tkri is a GUI front-end to the ‘ri’, or ‘qri’, executables. It displays their output in a window where each word is “hyperlinked”.
Use
Launch it by typing ‘tkri’ at the operating system prompt. You can provide a starting topic as an argument on the command line. Inside the application, type the topic you wish to go to at the address bar, or click on a word in the main text.
See the Help menu for more details.