I hate using expose and the alt-tab on Mac only addresses by application instead of the individual window. This is the first app I've encountered that does Alt+Tab (Like in Windows) right. The only annoyance I have with it is that it does include open apps in the list. Here's the description
"FREE for a limited time to celebrate the launch of my premier window management app: OPTIMAL LAYOUT 2. - Please check it out!
WindowFlow gives you an alternative way of switching between application windows.
Using the option-tab keyboard command you can quickly browse your list of open windows, seeing the Space the window is in and a preview of the window contents.
For many this is a quicker way of switching windows than using command-tab or Exposé."