Have you ever worked with several different TEX format files when typesetting
with TEX? One format file for your letters, another one for program
documentations, and many others for typesetting the documents of your friends?
Do you have to switch between format files containing hyphenation tables
for different languages? If your answer to one of these questions is 'Yes',
you will surely admit that setting an environment variable is not the most
comfortable way for selecting TEX format files.
This is why I wrote TEXFormat. This program enables you to select TEX format
files easily via an array of radiobuttons.