May I suggest:
cDevWorkflow. This is their market niche. Providing an embeddable high performance C+ engine built for .net4.0+ developers complete with HTML5 graphical designer, visual process management and business intelligence all in one package, without all the restrictions or rules to get in your way.
If you are looking for an engine that performs those higher level processing needs that the popular free workflow products can not. Or if you require a software product that has more structure, support and on going development than limited use, shareware or opensource then this is a great product for you to evaluate.
Ease of Use the HTML5 graphical workflow designer requires no special training.
Business Process Management tools enable users to track and control business activities.
Business Intelligence tools real-time process information: more throughput, less effort.
Embeddable Process Decision Engine increases workflow efficiencies by using runtime execution data.
Additional data:
Workflow Technology