GPM (software)
GPM ("General Purpose Mouse") software provides support for mouse devices in Linux virtual consoles. It is included in most Linux distributions. ncurses supports GPM; many applications use ncurses mouse-support. Other applications that work with GPM include Midnight Commander, Emacs, and JED. See also

 moused, a mouse-driver for FreeBSD

Sources

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Free system software
Free software programmed in C
Linux software