Software for Web
Grav is a modern free and open source flat-file content management system. With Grav, you can publish content and build sites in a fast, flexible and simple manner with the file-based web platform. Grav requires zero installation and is just an zip archive that can be extracted to start using the CMS. Grave also comes with a powerful package management system that allow you to extend the feature set of Grav CMS. With the package management system you can install and upgrade themes and plugins written specifically for Grav. The software is written in PHP and released fully free and open-source under the MIT License.
Magnolia CMS is the superior headless content management solution for a reliable DX platform. With Magnolia you can unify your content and create data-driven, omnichannel experience.
Contentful is a modern headless CMS that integrates with development teams and their workflows. With an API-first approach, implementing Contentful into an existing application is easier than ever. The content management system features a customizable interface, content modeling, and cloud-based governance. With Contentful you can have a RESTful API setup in minutes, which integrates well with your existing architecture.
Exponent CMS is a notable free and open source content management system that contains its own independent modular software framework of enterprise level.
Quanta is a free, open source Content Management Framework thought for programmers and used for the creation of new-generation websites and applications.
Textpattern is an elegant content management system that is free, open source software. Textpattern is designed to be flexible with powerful tag-based templates that allow you to structure data and manipulate content. The content management system itself can also be extended with the use of plugins, that allow anyone to improve core functionality or add new features. Textpattern already have hundreds of available community built plugins that can be used to improve your website today.
Django CMS is a free and open-source content management system build on the Python web framework Django. With Django CMS, you can create your own website or blog in a matter of minutes which is easy to maintain far into the future. If you are a developer utilizing the Django framework you can integrate Django CMS into an exiting Django application and take advantage of it's publishing and editing features.
phpSQLiteCMS - a simple & lightweight CMS
Bear CMS is a self-hosted content management system that seamlessly integrates with your website. With Bear CMS you own your data and content, which is store on your own server. Your websites and Bear CMS's management tools integrate seamlessly and creates an experience that content managers and editors will enjoy.
A headless & API-based CMS with an opt-in head and a visual editor. With Storyblok you can manage your content through an intuitive dashboard and access that data though the content delivery API, as nested JSON. Storyblok is an open-source software and can be used as such, but is also provided as a commercially hosted, cloud rendering service. As a front-end developer you can choose to work with any template engine, framework or system of your choice.