Umbraco

Strapi is an open-source headless CMS that revolutionizes the way developers build and manage APIs. Written in JavaScript, Strapi offers a powerful and flexible solution for creating content-rich applications. As a headless CMS, it separates the content management backend from the frontend presentation layer, allowing developers to use any frontend technology they prefer. Strapi provides a user-friendly admin panel for content editors, customizable content types, and built-in user and role management. Its plugin system and RESTful API make it highly extensible and adaptable to various project requirements. With features like internationalization, media management, and GraphQL support, Strapi is suitable for a wide range of applications, from small websites to large-scale, multi-platform projects.

OpenCities is a content management system built for government organizations.

A file-based content management system (CMS) that simplifies website and web application development by using text files for content management instead of a traditional database.

Google Sites is a free, user-friendly website creation tool integrated with Google Workspace. It allows users to create simple websites for personal or team use, with easy collaboration and integration with other Google services.

Quintype is a digital publishing platform that provides content management, audience engagement, and monetisation solutions for digital media organisations.