Synergy 2 - many computers with one mouse and keyboard

This is the tool I’m using for long time now and I find it very useful. I often work on two laptops at the same time and switching between keyboards becomes very frustrating. There is the tool called Synergy 2. It allows working on many computers with just one mouse and one keyboard.

All you have to do is download it and install on all computers you want to use, choose one which will be your command centre and configure how screens are placed. And cool thing is it works on Windows, Linux and Mac! And it is free.