ShareMouse lets you share your mouse and keyboard with multiple networked computers.
When you reach the border of the monitor, the mouse cursor magically jumps to the neighboring monitor and you can then control that computer.
All mouse and keyboard input is encrypted and transmitted over your existing Ethernet or Wireless LAN network connection.
Also ShareMouse enables you to drag & drop files between multiple computers and whatever you copy into the clipboard of one computer is available in the clipboard of any other computer.
Moreover ShareMouse allows you to control a Mac from a PC. It also works the other way round and you can control a PC from a Mac.