Comprehensive list of all plugins?

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Some places you can look at:

• Plugins that are shipped with Gazebo
• Example plugins which in Gazebo's source code, but that aren't shipped
• Plugins in gazebo_ros_pkgs

There are several other plugins distributed by different packages though. Unfortunately there isn't a centralized list where you can find all of them.

This might be useful. It has the list of all gazebo plugins in ROS1 which have been approved by the organization. Also mentions which of them are being deprecated.