Sitecake - Drag and drop CMS for HTML websites. It's flat file CMS so it's pretty fast.
inRiver - inRiver offers product information management solutions helping B2C and B2B multi-channel commerce tell perfect stories across channels.
Anchor CMS - Free and lightweight blogging system
Akeneo - Akeneo is an open-source Product Information Management solution.
Textpattern - Textpattern is an elegant content management system that is free, open source software.
Alkemics - Alkemics is a multi-channel product page management platform.