You can also look up for these other topics:
Framework
Coding Standards
Boilerplate
CMS
Tool
Security
Hacktoberfest
Provides an improved replacement for the array_replace PHP function
symfonyRedux is a simple, truly extensible options framework for WordPress themes and plugins!
reduxframeworkA Simple and Lightweight WordPress Option Framework for Themes and Plugins
CodestarA WordPress plugin for adding ACF options page support for Polylang.
BeAPI