Oracle TimesTen - TimesTen is an in-memory, relational database management system with persistence and...
Camunda - The Universal Process Orchestrator
Datahike - A durable datalog database adaptable for distribution.
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.
Datomic - The fully transactional, cloud-ready, distributed database
jBPM - jBPM is a flexible Business Process Management (BPM) Suite.