WP Query

WordPress Codex

Customizing the WordPress Admin

Custom Admin Menus

The Ins and Outs of The Enqueue Script For WordPress Themes and Plugins

How To Create A WordPress Plugin

WordPress Essentials: WordPress plugins are PHP scripts that alter your website. The changes could be anything from the simplest tweak in the header to a more drastic makeover (such as changing how log-ins work, triggering emails to be sent, and much more). (This article has been checked and updated on July 5th, 2017.) — Smashing Magazine

ACF to REST API

Exposes Advanced Custom Fields Endpoints in the WordPress REST API

Add Theme Color Palette to the Gutenberg Block Editor for WordPress

Hassle Free Responsive Images for WordPress

– CSS-Tricks

Automattic Design Award

Honoring the best site, solution, style of 2018

MapSVG

WordPress map plugin

Displaying Posts Using a Custom Select Query