RocketDock is definitely one of my favorite application launchers because of how well it is designed to mimic the functionality of the Mac Dock. It can also be extended with skins to change the appearance, or with docklets to add more features.
The most popular addon across all of the different categories is the Stacks Docklet with over 800,000 downloads! As you can see in the screenshot to the right this emulates the Mac version of Stacks very well, and it’s pretty hard to tell it apart from the Mac Dock if you’ve got the right skin.
The addon hasn’t been updated in a little while, but that doesn’t mean development has stopped. In fact the developer is currently working on rewriting the Stacks Docklet, and if you’re feeling adventurous you can jump in on a pre-release version.