Camunda - The Universal Process Orchestrator
Airtable - Airtable works like a spreadsheet but gives you the power of a database to organize anything. Sign up for free.
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.
Knack - Knack is the easiest, most spectacular business management software available.
jBPM - jBPM is a flexible Business Process Management (BPM) Suite.
Zoho Creator - Zoho Creator is a low-code application development platform that helps you build a custom, mobile-ready apps to run your business.