Docky is a full fledged dock application that makes opening common applications and managing windows easier and quicker.

Cairo-Dock is a desktop interface that takes the shape of docks, desklets, panel, etc.

Plank is meant to be the simplest dock on the planet.

Synapse is a semantic launcher written in Vala that you can use to start applications as well as find and access relevant documents and files by making use of…

Avant Window Navigator (AWN or Awn) is a dock-like bar for Linux, which sits on an edge of a user's screen and tracks open windows.