Classic Window Management gives you the option to have windows in Mac OS X behave like they did in Mac OS 9, where all of an application's windows stayed grouped together. So when you click on one window, all windows belonging to that application come to the front.
The Classic Style Window Layering is particularly useful in the Finder. Normally, in OS X, when you click on the Desktop you switch to the Finder but none of its windows are brought forward. With CWM, all open Finder windows are brought to the front, just like they were in OS 9. (This was actually the primary motivation behind this project!)
But the OS X Way can be useful!
Version 1.1 fixes a bug involving improper framework loading and improves compatibility with other Application Enhancer modules. All 1.0 users are encouraged to upgrade.
Mac OS X 10.2 or later, Application Enhancer (APE) v1.2.1 or later (CWM is implemented as an APE module). If you do not already have APE installed, it can be downloaded here, free of charge.