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
SolarWinds Service Desk - An IT service management (ITSM) solution that understands what it takes to successfully manage your employee services. Try Solarwinds Service Desk for free!
Joget.org - Open Source Workflow Software, Business Process Management and Low-Code Application Platform.
Scribus - Scribus is a desktop publishing (DTP) application.