Airtable - Airtable works like a spreadsheet but gives you the power of a database to organize anything. Sign up for free.
Imixs-Workflow - Imixs Workflow is a BPM Framework with the goal to reduce the complexity of business applications.
Zoho Creator - Zoho Creator is a low-code application development platform that helps you build a custom, mobile-ready apps to run your business.
ProcessMaker - ProcessMaker is an easy to use BPM and workflow software solution. It is used to design, automate, and deploy business processes of any kind.
Ragic - World's most advanced online database engine. Build powerful online databases with simple Excel style online interface.
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.