Camunda - The Universal Process Orchestrator
Ansible - Radically simple configuration-management, application deployment, task-execution, and multi-node orchestration engine
jBPM - jBPM is a flexible Business Process Management (BPM) Suite.
Datamatics TruBot - TruBot is an enterprise grade, multi-skilled bot programmed to enhance your enterprise’s productivity. It automates a range of simple as well as complex processes.
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.
Automation Anywhere - Automation Anywhere Premier Revolutionizing automation software New Version: Supports Windows 8