Vacuum is an experiment of turning Wordpress into a static site.
In fact, you don't need Wordpress to use Vacuum, just Json files.
SEO friendly with all the metadata you need.
Easily add new properties editing static json files.
Just like you would have in Wordpress.
Image handling and featured thumbnails.
Vacuum uses just two main dependencies: FastRoute and Twig.
Of course you might extend it installing the library you want.
Vacuum is intended to be fast, but it with all the power and flexibility of PHP.