Moodle: all plugin (extention modules) types

Trabla: Moodle: all plugin (extention modules) types

Solving:

The M in Moodle stands for modular. The easiest and most maintainable way to add new functionality to Moodle is by writing one of these types of plugin. If none of the standardized types fits your needs, you can use the "local" type.

Plugin type	Component name	Moodle path	Description	Moodle versions
Activity modules	mod	/mod	Activity modules are the most important type of plugins. They provide activities in courses. For example: Forum, Quiz and Assignment.	All
Admin reports	report	/admin/report	Provides useful views of data in a Moodle site, for admins only.	Up to 2.1 (for 2.2+ see Reports)
Admin tools	tool	/admin/tool	Provides utility scripts useful for admins to examine and modify a Moodle site	2.2+
Assignment 2.2 types	assignment	/mod/assignment/type	Different forms of assignments to be graded by teachers	1.x - 2.2
Assignment 2.3 submissions	assignsubmission	/mod/assign/submission	Different forms of assignment submissions	2.3+
Assignment 2.3 feedbacks	assignfeedback	/mod/assign/feedback	Different forms of assignment feedbacks	2.3+
Atto editor plugin	atto	/lib/editor/atto/plugins	Extra functionality for the Atto text editor	2.7+
Authentication plugins	auth	/auth	Allows connection to external sources of authentication	2.0+
Availability conditions	availability	/availability/condition	Conditions to restrict user access to activities and sections.	2.7+ (proposed)
Book tool	booktool	/mod/book/tool	Small information-displays or tools that can be moved around pages	???
Blocks	block	/blocks	Small information-displays or tools that can be moved around pages	2.0+
Cache store	cachestore	/cache/stores	Cache storage back-ends.	2.4+
Cache locks	cachelock	/cache/locks	Cache lock implementations.	2.4+
Calendar types	calendartype	/calendar/type	Defines how dates are displayed throughout Moodle	2.6+
Course formats	format	/course/format	Different ways of laying out the activities and blocks in a course	1.3+
Course reports	coursereport	/course/report	Reports of activity within the course	Up to 2.1 (for 2.2+ see Reports)
Database fields	datafield	/mod/data/field	Different types of data that may be added to the Database activity module	1.6+
Database presets	datapreset	/mod/data/preset	Pre-defined templates for the Database activity module	1.6+
Editors	editor	/lib/editor	Alternative text editors for editing content	2.0+
Enrolment plugins	enrol	/enrol	Ways to control who is enrolled in courses	2.0+
External tool source	ltisource	/mod/lti/source	Ways to control who is enrolled in courses	2.7+
Filters	filter	/filter	Automatically convert, highlight, and transmogrify text posted into Moodle.	1.4+
Gradebook export	gradeexport	/grade/export	Export grades in various formats	1.9+
Gradebook import	gradeimport	/grade/import	Import grades in various formats	1.9+
Gradebook reports	gradereport	/grade/report	Display/edit grades in various layouts and reports	1.9+
Grading methods	gradingform	/grade/grading/form	Interfaces for actually performing grading in activity modules (eg Rubrics).	2.2+
Local plugins	local	/local	Generic plugins for local customisations	2.0+
Messaging consumers	message	/message/output	Send messages to users via different methods (email, sms, jabber, etc)	2.0+
Plagiarism plugins	plagiarism	/plagiarism	Define external services to process submitted files and content	2.0+
Portfolio plugins	portfolio	/portfolio	Connect external portfolio services as destinations for users to store Moodle content	1.9+
Question behaviours	qbehaviour	/question/behaviour	Control how student interact with questions during an attempt	2.1+
Question formats	qformat	/question/format	Import and export question definitions to/from the question bank	1.6+
Question types	qtype	/question/type	Different types of question (e.g. multiple-choice, drag-and-drop) that can be used in quizzes and other activities	1.6+
Quiz access rules	quizaccess	/mod/quiz/accessrule	Add conditions to when or where quizzes can be attempted, for example only from some IP addresses, or student must enter a password first	2.2+
Quiz reports	quiz	/mod/quiz/report	Display and analyse the results of quizzes, or just plug miscellaneous behaviour into the quiz module	1.1+
Reports	report	/report	Provides useful views of data in a Moodle site for admins and teachers	2.2+
Repository plugins	repository	/repository	Connect to external sources of files to use in Moodle	2.0+
SCORM reports	scormreport	/mod/scorm/report	Analysis of SCORM attempts	2.2+
Themes	theme	/theme	Change the look of Moodle by changing the the HTML and the CSS.	2.0+
TinyMCE editor add-on	tinymce	/lib/editor/tinymce/plugins	Extra functionality for the TinyMCE text editor.	???
User profile fields	profilefield	/user/profile/field	Add new types of data to user profiles	1.9+
Webservice protocols	webservice	/webservice	Define new protocols for web service communication (such as SOAP, XML-RPC, JSON, REST ...)	2.0+
Workshop allocation methods	workshopallocation	/mod/workshop/allocation	Define ways how submissions are assigned for assessment in the Workshop module	2.0+
Workshop evaluation methods	workshopeval	/mod/workshop/eval	Implement the calculation of the grade for assessment (grading grade) in theWorkshop module	2.0+
Workshop grading	strategies	workshopform	/mod/workshop/form	Define the type of the grading form and implement the calculation of the grade for submission in the Workshop module	2.0+

Official Docs: https://docs.moodle.org/dev/Plugin_types
PRO TIP: You can get the most exact list of types in your version of Moodle with the following script:

<?php                                                                                                        
 define('CLI_SCRIPT', true);
 require('path/to/config.php'); // global moodle config file.
 print_object(get_plugin_types());