This is an informational email about another concurrent to ryppl and nugets++ but with a narrower target/usage apparently: https://github.com/iauns/cpm
As it's open source, it's not only a concurrent but a potential source of information and exchange. I think.
FYI, I think "concurrent" here means "competitor" in this context."concurrent" is a French-English http://en.wikipedia.org/wiki/Faux_amis. --DD