The image viewer market is a tough and competitive place, and it’s extremely difficult for newcomers to stand out from the crowd. You might try to pack in the features, for instance – but it probably won’t make any difference. A big-name contender like IrfanView has been around for almost 18 years, and creating something even a fraction as powerful would take a very long time.
Fortunately, Fragment Image Viewer took another route. It’s not crammed with functions, there are no editing or batch processing tools: compared to many viewers, it’s really quite basic. But the program does have a few interesting and unusual tricks, which might, perhaps, persuade you to give it a try.