Sitecake - Drag and drop CMS for HTML websites. It's flat file CMS so it's pretty fast.
Kissflow - Kissflow is a workflow tool & business process workflow management software to automate your workflow process. Rated #1 cloud workflow software in Google Apps Marketplace.
Textpattern - Textpattern is an elegant content management system that is free, open source software.
Pipefy - Pipefy is a process management software that empowers anyone to create and automate efficient workflows on their own without code.
TYPO3 - TYPO3.com - Infos, SLAs, Extended Support Versions and more
Process Street - Create beautiful rich process documents in a simple to follow checklist format. Fast, free and incredibly simple to use.