Now that Activity published the first release (version 5.0) of their Open Source BPMN 2.0 engine and toolset, it was time to integrate it in our Open Source Reference Platform for SOA (OSRP).
Despite some initial weaknesses, such as BPMN error handling, Actitivi is very promising if you are looking for a lightweight, Open Source BPM engine. Especially the features in the areas IT/Business collaboration and human task integration are worth a closer look. The modularity makes it easy to integrate the engine with other products.
Using the OSRP one can now compare the BPMN and BPEL approaches to BPM, understand how Activiti can be combined with other Open Source SOA technologies such as Apache ServiceMix ESB, and learn about the strenghts and limitations of the product.