Downloading themes or plug-ins from some random place on the internet and not the official and reliable sources, or developers, will maybe save you some money but what ends up happening is you can end up installing all sorts of spyware on your web domain, not to mention the code quality that can be poor and potentially harmful for performance. Watch out for crappy themes and plugins and take the time to analyze the market that you are entering to get what you need for your WordPress.
This is a multipurpose PHP + Bootstrap 5 web application theme.
CMS overview series – Joomla
If you are looking for a versatile CMS solution, you might want to check out Joomla. Joomla is a CMS that is rich with features and suitable for building and managing both small and large web applications. Joomla allows PHP ( yes, this is yet another PHP based CMS ) developers to create custom web applications and extend existing platform features. It is open source, and anyone can extend the functionality of the core Joomla system. Joomla is using a powerful templating system to build web pages, which makes it easy to create professional looking websites very quickly.