eucalyptus  4.4.2
About: Eucalyptus (Elastic Utility Computing Architecture for Linking Your Programs To Useful Systems) is an infrastructure for implementing "cloud computing" on clusters (compatible with Amazon’s EC2 interface, but designed to support multiple client-side interfaces).
  Fossies Dox: eucalyptus-4.4.2.tar.gz  ("inofficial" and yet experimental doxygen-generated source code documentation)  

eucalyptus Documentation