Hi Rama,
As Bernd mention, Oryx was the name of the project a long time ago. The maintained branch that it's being used in jBPM5 it's called WAPAMA and there are a couple if big companies like Red Hat and Intalio supporting it and improving it to bring you the ultimate modeling experience.
We are also working, as a community effort, to be able to run all the activiti's UIs using jBPM5 in the back to demonstrate the advantages of running with a Rule Engine integrated and also with all the Complex Events processing features. For more information please take a look at the Smart Tasks Project here: https://github.com/salaboy/smart-tasks