RocketDock is a Mac OS X dock clone. It provides a nice clean interface to drop shortcuts on for easy access and organization. With each item completely customizable there is no end to what you can add and launch from the dock.Discontinued
The program is no longer updated, but last version, 1.3.5, released in September 2008, can be still downloaded from the official website. "It is true, RocketDock has been discontinued. [...] The app remains available on https://rocketdock.com, but is unsupported."
A dock for the Gnome Shell. This extension moves the dash out of the overview transforming it in a dock for an easier launching of applications and a faster switching between windows and workspaces.
Luncher is a simple Windows application and file launcher. It allows you to setup buttons that act as shortcuts to open any application, file or folder. Luncher appears as a small panel on the top of the screen that is always easily accessible.