Is anyone maintaining an index of websites with CLIs? The topic deserves further study. Many of us have observed that doing some kinds of work via command line can be better than via a GUI. Perhaps this holds for some web-based tools/apps as well.
Note: I did not make this, I am posting this because I think it looks cool.
Also, I was trying to figure out what libraries they used to make it but was not able to figure it out :X
Probably not shellinabox, but this is one tool you may be interested in, if you want to provide shell interface to CLI programs on the web. https://github.com/shellinabox/shellinabox