WordPress
https://github.com/topics/wordpress
WordPress starter theme with Laravel Blade components and templates, Tailwind CSS, and a modern development workflow - https://github.com/roots/sage - https://roots.io/sage/
WordPress boilerplate with Composer, easier configuration, and an improved folder structure - https://github.com/roots/bedrock - https://roots.io/bedrock/
Create WordPress themes with beautiful OOP code and the Twig Template Engine - https://github.com/timber/timber/
https://github.com/grrr-amsterdam/wordpress-scaffold
https://github.com/grrr-amsterdam/simply-static-deploy
Automattic acquires Frontity - https://thenewstack.io/frontity-and-the-future-of-wordpress-as-a-dev-platform - - https://frontity.org/blog/frontity-is-joining-automattic - https://frontity.org - https://github.com/frontity/frontity
https://github.com/house-of-giants/hog-scaffold - from https://dev.to/magnificode/why-everyone-hates-wordpress-1ljd
https://deliciousbrains.com - Creators of Advanced Custom Fields, WP Migrate, WP Offload Media and WP Offload SES
Security
Scanner: https://pentest-tools.com/cms-vulnerability-scanning/wordpress-scanner-online-wpscan