WindowSwitcher 1.42 for Mac could be downloaded from the developer's website when we last checked. We cannot confirm if there is a free download of this app available. The most popular version among WindowSwitcher for Mac users is 1.3. This program is compatible with Mac OS X 10.6 or later. This Mac app was originally designed by MacPlus Software. This application's bundle is identified as guillaume-labarthe.WindowSwitcher. We recommend checking the downloaded files with any free antivirus.
From the developer:
WindowSwitcher enables you to easily switch between WINDOWS of the front most running application.
Using your keyboard and the shortcut ALT+TAB you will be more efficient in selecting the window you want.
You may want to check out more Mac applications, such as Window-Switch, which might be related to WindowSwitcher.