Controlling 2 computers with one mouse and keyboard

If you happen to have a spare computer then putting it to the cellar seems a bit extreme option. But even if you find what to do with extra hardware, it will always be troublesome to switch the work to other computer. Either by connecting to it remotely or working with it directly(meaning to having another workplace: table, chair). Even if you manage to place both computers on one desk, having 2 keyboards and mouses is space consuming. Unless you don't have those computers connected in one LAN you can always use Synergy to control both of them with one mouse and keyboard. Just point your mouse to the next monitor and you are already controlling your other computer! That way you can setup lots of systems and very different ones: windows, macs and linuxs. And then you can enjoy accessing all your computers very simply. That's how my system looks like:

Actually, this is not 3 computers connected with synergy, only 2. 2 monitors are connected to the same computer: very convenient when browsing and coding, or watching movie and browsing or other combination of actions:)