Yaoqiang is described as 'Download Yaoqiang BPMN Editor for free. an Open Source BPMN 2.0 / DMN 1.1 Modeler. Yaoqiang BPMN Editor is a graphical editor for business process diagrams, compliant with OMG specifications (BPMN 2.0 / DMN 1.1)'. There are three alternatives to Yaoqiang for Windows, Linux, Mac and Eclipse. The best alternative is Bonita BPM, which is both free and Open Source. Other great apps like Yaoqiang are Modelio (Free, Open Source) and Bizagi (Paid).
Bonita BPM is a BPM-based application platform that is designed to help users build highly engaging, personalized business applications that can be continuously updated to adapt to business changes in real time.
Modelio is an open source modeling tool supporting natively UML, BPMN and model exchange with XMI. It allows to draw all UML2 diagrams and specific diagrams for business process modeling. It is easy and powerful with the capacity to add new functionalities to the application.