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.
The software is intended for users with multiple computers on their desk. The software is free and open source and supports the most flavours of Linux and Windows.
We have done posts pointing to software that allows screen sharing before but I don’t think I’ve ever heard about software that enables me to do a screen share between computers running different OSs.
If this works as advertised it is even better for people who have access to both Windows and Linux machines. (link via okyere.org]