WordPress - WordPress is web software you can use to create a beautiful website or blog. We like to say that WordPress is both free and priceless at the same time.
ClearVoice - ClearVoice is a content marketing platform and service solution.
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.
SnapApp - SnapApp is an interactive content creation platform.
Sitecake - Drag and drop CMS for HTML websites. It's flat file CMS so it's pretty fast.
Percolate - Content Marketing Redefined. Percolate is the first end-to-end technology for content marketing.