Here on OStatic, back in 2008, we broke the story about a U.C. Santa Barbara cloud computing project called Eucalyptus. Now version 3.4 of Eucalyptus is out, and it is differentiated from other open cloud computing platforms, such as OpenStack, through its deep integration with Amazon Web Services. Eucalyptus was built in the first place to duplicate the functionality of Amazon’s EC2, using the Amazon command-line tools directly. The lates version is directly focused on organizations that want to build AWS-compatible private and hybrid clouds.