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).
Sheetgo for G Suite - Connect Google Sheets, Excel & CSV. Import, export, merge and filter data automatically.
Camunda - The Universal Process Orchestrator
BP Simulator for G Suite - Business process simulations modeling tool
Joget.org - Open Source Workflow Software, Business Process Management and Low-Code Application Platform.
CloudPages for G Suite - Manage and Monitor for G Suite