Linux's `make menuconfig` [0] and GDB's TUI interface [1] are the first ones that come to mind. Both are very powerful once you get to know them a bit, and are

Linux's `make menuconfig` [0] and GDB's TUI interface [1] are the first ones that come to mind. Both are very powerful once you get to know them a bit, and are still valuable tools today. [0] https://en.wikipedia.org/wiki/Menuconfig https://en.wikipedia.org/wiki/Menuconfig [1] https://sourceware.org/gdb/current/onlinedocs/gdb.html/TUI.html https://sourceware.org/gdb/current/onlinedocs/gdb.html/TUI.h...