Software program KVM (keyboard-video-mouse)
As stated, synergy functions quite possibly if you have all the displays near each various other and also simply intend to make use of a solitary key-board and also computer mouse in between them. It is additionally cross-platform. I utilize it with my linux desktop computer with my windows laptop resting simply to the exactly on my workdesk and also it functions faultlessly.
For even more like a remote desktop computer sort of remedy, there is certainly VNC, of which there are numerous variations around for various os. I often tend to make use of either UltraVNC or TightVNC on windows. (UltraVNC has a wonderful single-click exe building contractor that makes an ~ 200K exe which when run will certainly install a short-lived "server", and also connect to a fixed IP address, to the "customer" that remains in paying attention setting. Really convenient when you're attempting to aid someone over the phone.)
If you are especially requiring to accessibility Unix boxes from another location, you could intend to consider NX. It is really quickly, also on sensibly slow-moving links.