Do you have multiple computer and you are changing keyboard/mouse to view them? Here is the relief from Open Source software Synergy Synergy works on cross platform.
In one of my earlier projects, we have a developer write a program for Windows and named it 'pauli' (girl friend's name?). I recall the developer telling that this causes security threat - not sure if this is still existing in Synergy.
Hey, cross platform? Not a problem!! I am using this program on windows and Mac OS and it works well. From the tar ball, Linux seems to be supported as well.