RedisGraph - A high-performance graph database implemented as a Redis module.
Kissflow - Kissflow is a workflow tool & business process workflow management software to automate your workflow process. Rated #1 cloud workflow software in Google Apps Marketplace.
Titan Database - Titan : Distributed Graph Database
Nintex - Cloud-based digital workflow management automation platform
ArangoDB - A distributed open-source database with a flexible data model for documents, graphs, and key-values.
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.