TYPO3 is described as 'enterprise-class, open source CMS, used internationally to build and manage websites of all types, from small sites for non-profits to multilingual enterprise solutions for large corporations' and is an app in the Development category. There are more than 100 alternatives to TYPO3 for a variety of platforms, including Online / Web-based, Self-Hosted solutions, Linux, Windows and Mac. The best alternative is WordPress, which is both free and Open Source. Other great apps like TYPO3 are Ghost (Free, Open Source), Drupal (Free, Open Source), Grav (Free, Open Source) and Joomla (Free, Open Source).
💮 Mixcore CMS is an open-source modular, multi-tenant application framework built on top of ASP.NET Core (Dotnet Core). It is a completed open source ASP.NET Core (Dotnet Core) CMS solution. https://mixcore.org.
Lutece is an open source platform developed by the City of Paris to help you develop digital solutions. Honed for cities’ use through almost 20 years of development, Lutece has evolved into multifaceted platform with more than 400 plugins.
Backdrop CMS is a simple, lightweight, and easy to use Content Management System used to build attractive, professional websites. Use it for everything from a single-administrator's personal blog site, to a complex, multi-role, business e-commerce platform.
Automne is an open-source and intuitive CMS. It works on LAMP architecture. Users can edit the websites in a WYSIWYG environment. Developpers can quickly add modules via the integrated app generator without necessary knowing PHP, just XML.