Chef
Configuration management tool which uses a pure-Ruby, domain-specific language (DSL) for writing system configuration recipes. Supports Linux, UNIX, Windows, and AIX as first-class citizens for management.
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CloudRepo
Public and Private Maven and Python (PyPi) repositories. Fully managed and highly available repository hosting.
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ConDep
ConDep is a open source infrastructure configuration and deployment DSL (Domain Specific Language) specifically targeted to (but not limited to) the Windows Server platform. If your familiar with tools like Chef and Puppet, ConDep does very much the same, but with native support for Windows.
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Fig
A package management tool, similar to Ivy/APT, but language agnostic, faster and works well with both executables and libraries.
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Fog
The Ruby Cloud API library. Provides a Ruby API for interacting and managing many cloud providers, such as spinning up new instances, terminating old ones, attaching storage, etc. Currently supports more than 20 providers, including EC2, Rackspace, Brightbox, etc.
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FPM
Effing Package Managers (FPM) is a single tool that can generate rpm, deb, solaris, osx (pkg) and many other packages. It supports multiple inputs (directory, gem, egg, deb, etc) and can produce multiple outputs (rpm, deb, solaris, etc). It relieves the pain out of creating various kinds of packages.
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Monit
An open source utility for managing and monitoring processes, programs, files, directories and filesystems
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Puppet
Puppet is a tool designed to manage the configuration of Unix-like and Microsoft Windows systems declaratively.
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Vagrant Cachier
A Vagrant plugin that helps you reduce the amount of coffee you drink while waiting for boxes to be provisioned by sharing a common package cache among similiar VM instances.
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Veewee
veewee is a great tool for building Virtual Machine images (aka base boxes). It automates most of the steps and allows you to easily create readymade images for VirtualBox/Vagrant, VMWare Fusion, KVM and Parallels. No longer need to shy away from building custom VM images!
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