ClearVoice - ClearVoice is a content marketing platform and service solution.
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.
Anchor CMS - Free and lightweight blogging system
Styla.com - Content commerce solution for online retailers and brands
Textpattern - Textpattern is an elegant content management system that is free, open source software.