Run the pointer off the edge of the screen...onto a whole different computer? Forget the KVM switch, and use Synergy to interact with all your systems at once.
Applications for a variety of toolkits are coming together in a free best-of-breed desktop. To work together seamlessly, though, they need to follow important new standards.
If the sky is great while the ground is black, or the ground is right but the sky is washed out, use The GIMP to make the whole photo look properly exposed.