synergy

Synergy lets you easily share a single mouse and keyboard between
multiple computers with different operating systems, each with its own
display, without special hardware.  It's intended for users with
multiple computers on their desk since each system uses its own
display.
Redirecting the mouse and keyboard is as simple as moving the mouse off
the edge of your screen.  Synergy also merges the clipboards of all the
systems into one, allowing cut-and-paste between systems. Furthermore,
it synchronizes screen savers so they all start and stop together and,
if screen locking is enabled, only one screen requires a password to
unlock them all.

          

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License: GPL-2.0-or-later
URL: http://synergy-project.org/