Drupal is described as 'free software package that allows an individual, a community of users, or an enterprise to easily publish, manage and organize a wide variety of content on a website' and is a well-known app in the Business & Commerce category. There are more than 100 alternatives to Drupal for a variety of platforms, including Self-Hosted solutions, Online / Web-based, Windows, Linux and Mac. The best alternative is WordPress, which is both free and Open Source. Other great apps like Drupal are Ghost (Paid, Open Source), Grav (Free, Open Source), Joomla (Free, Open Source) and Backdrop CMS (Free, Open Source).
ORCHID is a tool that allows you to quickly write simple but powerful websites and applications. Provided as a package for Laravel, you can easily integrate it as a third-party component using Composer.
CSZ CMS is an open source web application that allows to manage all content and settings on the websites. CSZ CMS was built on the basis of Codeigniter and design the structure of Bootstrap, this should make your website fully responsive with ease.
Noosfero is a web platform for social networks with blog, e-Porfolios, RSS, thematic discussion and events agenda in the same system. Get to know, use it, participate and contribute to this free software project.
Mezzanine is a powerful, consistent, and flexible content management platform. Built using the Django framework, Mezzanine provides a simple yet highly extensible architecture that encourages diving in and hacking on the code.