When comparing Docky vs Plank, the Slant community recommends Docky for most people. In the question“What are the best app launchers for UNIX-like systems?” Docky is ranked 5th while Plank is ranked 7th. The most important reason people chose Docky is:
For those that do not like the OSX dock look there is also a panel mode included that pushed the apps to the left side of the panel and elongates the dock to fill the entire bottom of the screen, just as a regular OS panel would.
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Pros
Pro Panel mode
For those that do not like the OSX dock look there is also a panel mode included that pushed the apps to the left side of the panel and elongates the dock to fill the entire bottom of the screen, just as a regular OS panel would.
Pro Drag and drop apps to the dock
Users can easily drag and drop apps to the dock for easy launching. Any app that is added will stay on the dock until removed manually. This makes for a great way to have all of ones most used apps in one place.
Pro Many themes
There are several themes installed with the dock by default that aare easily switched in the settings. What is even better is that there are many themes available online for download as well. With the best part being thatt he themes are simple .svg files that are easily editable in Inkscape to customize to how one wants.
Pro Highly Customisable.
Pro Plugin Docklets
Docky provides simple applications that run inside of the dock such as a clock, weather forecaster and CPU monitor. These provide an easy way to see information without having to open up separate apps.
Pro Simple and minimal
Plank is a good choice for those looking for something simple that just does its job well. There is no UI for options built in to the dock as to change anything those options will have to be accessed through a text file.
Pro Solid and lightweight
Pro Third party themer available
An additional third party app has been developed that allows theming the dock without the use of any extra resources. This is great for those that are not using elementary OS and the elementary tweaks extra.
Cons
Con Removing Docky icon is not as easy as it should be
gconf editor is required in order to remove the Docky icon from the dock, which seems unnecessary as the setting exists, it should be in the app settings instead of hidden away in gconf.
Con No right click menu for some apps outside of elementary OS
Other file explorers and terminals (those not found in the default elementary OS) do not have any right click menus for the dock meaning it is impossible to launch multiple windows for certain file explorers or terminals.
Con Poor workplace awareness (cycling windows)
When configured to only show apps on current workspace, cycling an app open on multiple workspaces will switch workspace focus, update the dock and often leave you to cycle another app.