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The program is no longer updated, but last version, 1.3.5, released in September 2008, can be still downloaded from the official website.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."
DockView is a utility that adds a preview of the windows of the selected application in the macOS Dock. You just need to bring the mouse to its icon and thumbnails of all its windows will appear. By clicking on the one you need, you will immediately go to it.
DragThing is the original dock designed to tidy up your Macintosh desktop.
It puts all your documents, folders, and applications just a single click away. Highly flexible, it allows multiple docks, each customised to suit your exact needs.
It stores frequently-used clippings su.Discontinued
Notice on https://www.dragthing.com/ of discontinuation as of 2019.
DeskTidy comes in the form of a drop-down menu that you can place anywhere on your desktop and include files, folders, programs, etc. in it. Then you can use it as a program launcher to access to your applications and other stored items.