github.com/craftcms/craft

Allows defining custom content structures and fields to match any project requirements, enabling bespoke digital experiences without rigid templates, as highlighted in the key features.

Designed with content editors in mind, providing an intuitive control panel that reduces training time and improves editorial workflow, emphasized in the project's philosophy.

Supports managing multiple websites from a single installation with shared or localized content, ideal for agencies and large organizations, a core feature mentioned in the key features.

Offers GraphQL and REST APIs for decoupled frontends, making it suitable for modern web and mobile applications, as noted in the key features for headless use.

Features a wide range of official and community plugins to extend functionality, with resources highlighted in the README for further exploration.