Disco Process Mining tool
Disco from Flixicon is a more polished and commercial tool for Process mining. It is developed by the 2 researchers who contributed to the ProM tool. Luckily, Fluxicon provide Academic license. Disco is a good tool to do quick analysis of event logs. It allow easy import from spread sheet. ProM is more of the research and development tools. It allows us to create and customized process mining algorithms which is not available in Disco.
I wish Tableau also do the same. But since my data is public, I can also use Tableau Public for visualization work.
Here is the screen shot of Android patch contribution process model.