Add links to third-party projects

Author: kdeldycke

docs/contrib.rst

@@ -18,4 +18,41 @@ Please note that the quality and stability of those packages may be different
 than Click itself. While published under a common organization, they are still
 separate from Click and the Pallets maintainers.
 
+
+Third-party projects
+--------------------
+
+Other projects that extend Click's features are available outside of the
+click-contrib_ organization.
+
+Some of the most popular and actively maintained are listed below:
+
+==========================================================  ===========================================================================================  =================================================================================================  ======================================================================================================
+Project                                                     Description                                                                                  Popularity                                                                                         Activity
+==========================================================  ===========================================================================================  =================================================================================================  ======================================================================================================
+`Typer <https://github.com/fastapi/typer>`_                 Use Python type hints to create CLI apps.                                                    .. image:: https://img.shields.io/github/stars/fastapi/typer?label=%20&style=flat-square           .. image:: https://img.shields.io/github/last-commit/fastapi/typer?label=%20&style=flat-square
+                                                                                                                                                            :alt: GitHub stars                                                                                 :alt: Last commit
+`rich-click <https://github.com/ewels/rich-click>`_         Format help outputwith Rich.                                                                 .. image:: https://img.shields.io/github/stars/ewels/rich-click?label=%20&style=flat-square        .. image:: https://img.shields.io/github/last-commit/ewels/rich-click?label=%20&style=flat-square
+                                                                                                                                                            :alt: GitHub stars                                                                                 :alt: Last commit
+`click-app <https://github.com/simonw/click-app>`_          Cookiecutter template for creating new CLIs.                                                 .. image:: https://img.shields.io/github/stars/simonw/click-app?label=%20&style=flat-square        .. image:: https://img.shields.io/github/last-commit/simonw/click-app?label=%20&style=flat-square
+                                                                                                                                                            :alt: GitHub stars                                                                                 :alt: Last commit
+`Cloup <https://github.com/janluke/cloup>`_                 Adds option groups, constraints, command aliases, help themes, suggestions and more.         .. image:: https://img.shields.io/github/stars/janluke/cloup?label=%20&style=flat-square           .. image:: https://img.shields.io/github/last-commit/janluke/cloup?label=%20&style=flat-square
+                                                                                                                                                            :alt: GitHub stars                                                                                 :alt: Last commit
+`Click Extra <https://github.com/kdeldycke/click-extra>`_   Cloup + colorful ``--help``, ``--config``, ``--show-params``, ``--verbosity`` options, etc.  .. image:: https://img.shields.io/github/stars/kdeldycke/click-extra?label=%20&style=flat-square   .. image:: https://img.shields.io/github/last-commit/kdeldycke/click-extra?label=%20&style=flat-square
+                                                                                                                                                            :alt: GitHub stars                                                                                 :alt: Last commit
+==========================================================  ===========================================================================================  =================================================================================================  ======================================================================================================
+
+.. note::
+
+    To make it into the list above, a project:
+
+    - must be actively maintained (at least one commit in the last year)
+    - must have a reasonable number of stars (at least 20)
+
+    If you have a project that meets these criteria, please open a pull request
+    to add it to the list.
+
+    If a project is no longer maintained or does not meet the criteria above,
+    please open a pull request to remove it from the list.
+
 .. _click-contrib: https://github.com/click-contrib/