ILOG JRules - ILOG JRules is a business management system to allow developers and businesses to easily build and deploy a rule-based application that automates variable and fine-grained decisions.
Camunda - The Universal Process Orchestrator
SAS Business Rules Manager - Discover how SAS Business Rules Manager lets you create, deploy and manage business rules from one place.
jBPM - jBPM is a flexible Business Process Management (BPM) Suite.
Corticon - Progress Corticon Business Rules Engine helps organizations of all kinds make faster decisions by managing the rules that drive business 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.