Product : AppScale, Eucalyptus/Current, 4.4.5
Feature : Maturity, Assessment, General
Content Owner:  Bhagyashri (Shri) Bhagvat
Summary
Based on the Eucalyptus code-base that has been in production for over a decade, powering installations beyond 200K cores in size.
Details
https://en.wikipedia.org/wiki/Eucalyptus_(software)