Comega

A thanks to Sam Gentile for bringing this to my attention. I have not looked through all the capabilities since my main interest is with the concurrency capabilities. There is not yet a simple solution to specifying concurrency constraints and I am not sure from a first look that this provides one.

It is certainly powerful but I don't think that is the point. The aim is to be easy to use. I'll write again when I have a chance to grok these things