Eucalyptus

An open source software for building Amazon EC2-compatible private and hybrid cloud platforms

     

linux open-source virt cloud-paas c

Pallet

A tool to provision and maintain servers across various cloud platforms as well as virtual machine platforms, without any dependencies. Provides cloud and operating system independence.

     

linux windows osx open-source cloud-paas clojure

Phabricator

Phabricator is an open source collection of development and code management, including code reviews and audits, browsing repositories, tracking bugs, etc

     

linux osx open-source scm php

Rex

A agent-less server orchestration tool built on Perl

     

linux windows osx open-source orchestration perl