Do you remember the days where Synergy used to be free? You could install it on different computers, and share 1 mouse and one keyboard?
Well those days are done. Synergy is no longer free, as I found out recently looking for it.
While searching, I found this neat Microsoft tool that pretty much does the same thing. The only drawback is that it only works for Microsoft products (Windows)
It is really easy to install, and quit to setup. Options are well documented. Check it out here: