Added additional packages.

Author: lonnieezell

user_guide_src/source/libraries/official_packages.rst

@@ -36,3 +36,34 @@ the configuration files that allows any configuration setting to saved to the da
 while defaulting to the config files when not custom value has been stored. This allows
 an application to ship with the default config values, but adapt as the project grows
 or moves servers, without having to touch the code.
+
+
+*****
+Cache
+*****
+
+We provide a `PSR-6 and PSR-16 Cache Adapters <https://github.com/codeigniter4/cache>`_
+for CodeIgniter 4. This is not required for use, since CodeIgniter 4 comes with a fully-
+functional cache component. This module is only for integrating third-party packages
+that rely on the PSR interface provisions.
+
+
+******
+DevKit
+******
+
+`CodeIgniter DevKit <https://github.com/codeigniter4/devkit>`_ provides all of the
+development tools that CodeIgniter uses to help ensure quality code, including
+our coding standard, static analysys tools and rules, unit testing, data generation,
+file-system mocking, security advisories, and more. This can be used in any of
+your personal projects or libraries to get you rapidly setup with 17 different tools.
+
+
+***************
+Coding Standard
+***************
+
+The `CodeIgniter Coding Standard <https://github.com/CodeIgniter/coding-standard>`_
+holds the official coding standards of CodeIgniter based on PHP CS Fixer and powered by
+Nexus CS Config. This can be used into your own projects to form the basis of a
+consistent set of style rules that can be automatically applied to your code.