Another "more-or-less graphical" user interface that is quite useful is ncurses, which gives you quite good interfaces in the terminal. Curses::UI is a good start for this.
You can make nice user interfaces, and as a bonus, this also works over SSH. Which is quite a useful feature when you are working remotely on a system that had no monitor, keyboard and mouse. Like, for example, a Raspberry Pi stuffed into some other project like an autonomous RC car.
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