x2x worked fine for input devices. Later, things like x2vnc made the idea more cross-platform (X on the local unix-like box, VNC on some other platform), but o

x2x worked fine for input devices. Later, things like x2vnc made the idea more cross-platform (X on the local unix-like box, VNC on some other platform), but only with two machines. After that, Synergy became a thing, and supported many machines, but then they eventually went to a model that tended to require payment. Later, Barrier forked from Synergy, and it allows much of the same functionality. It's still very free, and it still works, but it's kind of abandoned. Today, there's Input Leap. It is (naturally) a fork of Barrier, and it is still sees regular development. https://github.com/input-leap/input-leap https://github.com/input-leap/input-leap