Ansible
A versatile orchestration engine that can automate systems and apps. Instead of a custom scripting language or code, it is very simple and shell based. It is also agent-less, so you can just start using it right away and get things done
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Berkshelf
A cookbook source structure manager for Chef, similar to Bundler for Ruby. Each Chef cookbook can be structured as an individual entity and can be pulled into your main Chef workflows.
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Bolt
Bolt is an open source commandline tool for executing commands, scripts, and orchestrated workflows on remote systems using SSH and WinRM
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Capistrano
The Ruby equivalent of Fabric, Capistrano is a Ruby framework to configure and run deployment or system administration tasks on local or remote machines. It extends the Rake DSL to define tasks, and can group tasks by Roles.
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credmgr
Securely manages privileged account credentials, such as root passwords, using Shamir secret sharing. Its like 1Password for DevOps.
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Deployinator
A simple, rack-based deployment framework
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Fabric
Fabric is a python framework to configure deployment or system administration tasks, and then run those tasks on local or remote systems. It uses SSH heavily for interacting with remote systems, and uses Roles to group tasks
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GitLab
GitLab is an open-source, fully featured git web frontend developed using Ruby on Rails. You can host this in your own server, create projects, repositories and teams, manage fine grained access permissions, add wikis, collaborate, raise and merge pull requests, and do much more through the web! (Note: GitLab acquired Gitorious, another open source git management system, in March 2015)
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Mina
A Ruby Rake-like DSL for fast deployment and automation, similar to Capistrano but faster and lesser overhead, since it creates only a single SSH connection for a deploy
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Nebula
Nebula is a Docker orchestration tool designed to manage massive scale distributed clusters
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Orc
A model driven orchestration tool for deployment of application clusters
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Review Board
Review Board is a feature packed code review tool for multiple SCM systems (like git, bzr, cvs, subversion, etc).
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SaltStack
Salt is a powerful and different approach to infrastructure management, by focusing on high speed communications between large number of systems, and can perform orchestration, remote code execution and much more.
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Sequencer
Sequencer can ping, power on and power off clusters of machines in your datacenter
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StackStorm
A platform for event-driven automation. StackStorm allows you to integrate and automate across services and tools. It ties together your existing infrastructure and application environment so you can more easily automate that environment -- with a particular focus on taking actions in response to events.
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