Dasein Cloud - Open Source Cloud Abstraction Library

Dasein Cloud (pronounced "da z-eye-n") is a Java-based cloud abstraction layer that enables programmers to build applications under a "write-once, run against any cloud" philosophy. It provides an abstract model under which most IaaS and some PaaS services can be modeled. Developers write applications to the Dasein Cloud model and it is then translated into the underlying cloud provider model.