docAlpha - docAlpha is a document capture and data extraction software solution.
RunaWFE - RunaWFE Free is a free Open Source BPMS (business process management system), which serves to optimize and automate business processes (for Windows, Linux, Mac OS).
Form Publisher - Form Publisher turns Google Forms submissions into a Google Docs, Sheets, Slides or PDF document, which can be sent for workflow approvals
Camunda - The Universal Process Orchestrator
RicohDocs - RicohDocs is a complete office automation system that enables the users to automate all the document-related business processes.
Joget.org - Open Source Workflow Software, Business Process Management and Low-Code Application Platform.