Fork CMS is a new take on PHP CMSes. Built on a contemporary base that is a customised version of the Symfony2 framework, this is a challenger to keep note of.
Fork CMS is a tool that is an impressive entry to the already established content management system market. With comprehensive feature set with a functional market place featuring extensions as applications as well as theme store, it's a potential challenger for established players like Drupal and WordPress.
The market place contains extensions that pushes the application beyond the core features of content management. It is notable, however that public REST and GraphQL APIs are not a priority in development. This can lead to a monolithic structure, that might be a limitation in micro services architectures.