When comparing Plank vs tint2, the Slant community recommends Plank for most people. In the question“What are the best docks for Linux?” Plank is ranked 1st while tint2 is ranked 3rd. The most important reason people chose Plank is:
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.
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Pros
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.
Pro Easy to theme and customize
You can easily tweak the panel and make it very good looking by using tint2-settings.
Pro Lightweight
Very lightweight with minimal resource use. Often used with lightweight window managers.
Pro Feature rich
Despite being lightweight, tint2 provides most options available for system panels including launchers, taskbar, system tray, clock.
Pro Panel as well as dock
Depending on configuration, tint2 can be a panel with taskbar, systemtry, menu, battery etc or as a standalone dock for launchers.
Pro Multi-instant support
Many instances of tint2 can be opened concurrently using different config files.
Pro Works as a simple dock for i3wm
Tiling WMs are great but sometimes the mouse is your friend too! Tint2 can easily be configured as a little dock for i3wm.
Cons
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.
Con No intelligent hide option
Tint2 provides autohide option but there's no way to autohide it when windows are maximized or overlap the panel.