In emacs it is possible to switch buffers by typing Ctrl-X B and you can start typing the name of another buffer, and as you type you can auto-complete the name of buffers which match what you have typed.

In Windows there is a script for AutoHotKeys called iswitchw which emulates the behaviour of emacs but instead of switching between the buffers in emacs, it allows you to switch between Windows (based on the title of the Window).

Is there any similar tool which allows the user to switch between Windows in Ubuntu/unity?