Software

Advanced content management and publishing platform. The current version is called 'Revolution'. ([Source Code](https://github.com/modxcms/revolution))

Neos or TYPO3 Neos (for version 1) is a modern, open source CMS. ([Source Code](https://github.com/neos))

Platform for social and solidarity economy networks with blog, e-Portfolios, CMS, RSS, thematic discussion, events agenda and collective intelligence for solidarity economy in the same system

Create complex narratives and share rich collections, adhering to Dublin Core standards with Omeka on your server, designed for scholars, museums, libraries, archives, and enthusiasts. ([Demo](https://omeka.org/classic/showcase/), [Source Code](https://github.com/omeka/Omeka))

Developer-first headless CMS and application framework. ([Source Code](https://github.com/payloadcms/payload))

Multi-channel experience and engagement management platform. ([Source Code](https://github.com/pimcore/pimcore))

Powerful open-source CMS system. ([Source Code](https://github.com/plone))

Simple but full featured web publishing software. ([Source Code](https://github.com/publify/publify))

Simple, flexible and useful content management system (documentation in German). ([Source Code](https://github.com/redaxo/core))

Easy to use CMS with powerful MVC framework underlying. ([Demo](https://demo.silverstripe.org/), [Source Code](https://github.com/silverstripe))

Publication system for the Internet aimed at collaborative work, multilingual environments, and simplicity of use for web authors. ([Source Code](https://git.spip.net/))

Headless CMS, based on MongoDB, CQRS and Event Sourcing. ([Demo](https://cloud.squidex.io), [Source Code](https://github.com/Squidex/squidex))

The most advanced open-source Content Management Framework (headless-CMS) to build powerful API with no effort. ([Source Code](https://github.com/strapi/strapi))

Flexible, elegant and easy-to-use CMS. ([Demo](https://textpattern.co/demo), [Source Code](https://github.com/textpattern/textpattern))

Author-friendly flat-file-cms with a visual markdown editor based on vue.js. ([Source Code](https://github.com/typemill/typemill))

Powerful and advanced CMS with a large community. ([Source Code](https://github.com/TYPO3/typo3))

The friendly CMS. Free and open source with an amazing community. ([Source Code](https://github.com/umbraco/Umbraco-CMS))

Powerful and easy to use CMS to build websites, blogs or e-commerce stores. ([Demo](https://demo.vvveb.com), [Source Code](https://github.com/givanz/Vvveb))

Django content management system focused on flexibility and user experience. ([Source Code](https://github.com/wagtail/wagtail))

Speedy and secure content management system built on the Laravel PHP framework. ([Source Code](https://github.com/wintercms/winter))

WonderCMS is the smallest flat file CMS since 2008. ([Demo](https://www.wondercms.com/demo), [Source Code](https://github.com/WonderCMS/wondercms))

World's most-used blogging and CMS engine. ([Source Code](https://github.com/WordPress/WordPress))

CRM including a unified workspace, enterprise messaging and a low code environment for rapidly and securely delivering records-based management solutions. ([Demo](https://latest.cortezaproject.org), [Source Code](https://github.com/cortezaproject/corteza))

Analytical CRM with tasks management, email marketing and many more. Django CRM is built for individual use, businesses of any size or freelancers and is designed to provide easy customization and quick development. ([Source Code](https://github.com/DjangoCRM/django-crm))