plugins/index
From MoodleDocs
Moodle Plugins Directory
Moodle Plugins Directory allows users to browse through contributed Moodle plugins. Also users registered on moodle.org can contribute their own plugins.
Please refer to Installing_plugins on how to install plugins.
Developers contributing their plugins please refer to development documentation: Plugins Developement and Plugin validation
The code of the Directory itself is a local plugin on moodle.org.