Mac OS X 10.6 Snow Leopard users can now add OS X Lion’s iOS-style Launchpad feature to their desktops with a free third party utility called MacLaunchPad.
MacLaunchPad is pretty similar to the real thing, and some features are closer to the version of Launchpad that appears in OS X Mountain Lion, like the real-time app search function. You can set some customizations that don’t exist in the Lion version too, like giving you the ability to change the amount of visible icons per Launchpad page. As usual with Launchpad, you can set hot keys to activate and deactivate the app, or even arrange and uninstall apps directly from the panels.
MacLaunchpad is compatible with Mac OS X 10.6 Snow Leopard and Mac OS X 10.5.8 Leopard.