Symphony CMS - Symphony is an XSLT-powered open source content management system
Lavalite - PHP CMS built with Laravel and Bootstrap.
Drupal - Drupal - the leading open-source CMS for ambitious digital experiences that reach your audience across multiple channels. Because we all have different needs, Drupal allows you to create a unique space in a world of cookie-cutter solutions.
Blogsvertise - Blogsvertise is an influencer marketing software designed to help businesses discover content creators, collaborate with influencers, and manage marketing campaigns on a centralized platform.
Glfusion - glFusion is an extremely powerful system for creating online content.
ApostropheCMS - Apostrophe is a powerful website builder platform built on an enterprise open source CMS, offering in-context live editing, visual design tools, and multisite enablement in a full stack JS environment.