What is the best Linux Dock available? I'm looking for a Dock that I can customize to make it look the way I like. It needs to be theme-able and have lots of configuration options.
Please limit one dock solution per answer
Ubuntu – What docks are available?
docksoftware-recommendation
Related Solutions
cheese 
Cheese uses your webcam to take photos and videos, applies fancy special effects and lets you share the fun with others.
Cheese uses GStreamer to apply fancy effects to photos and videos. With Cheese it is easy to take photos of you, your friends, pets or whatever you want and share them with others. After the success of the Summer of Code, the development continued and we still are looking for people with nice ideas and patches ;)
StackApplet
Category: Other
StackApplet is a GNOME panel applet that monitors your activity on any StackExchange site.
stackapplet 
in Ubuntu Software Center
For Ubuntu 12.04 to 14.04:
Get the latest version as follows:
sudo add-apt-repository ppa:stackapplet-dev/stackapplet
sudo apt-get update
sudo apt-get install stackapplet
The first time the application is used, run
python /usr/share/stackapplet/stackapplet.py &
from a terminal.
Best Answer
Docky
I think Docky is the best dock on Linux, fully configurable and theme-able with many useful add-ons. You can easily give it a try, you'll find it in the Ubuntu Software Center.