[Configuration management (CM)](https://en.wikipedia.org/wiki/Configuration_management) is a systems engineering process for establishing and maintaining consistency of a product's performance, functional, and physical attributes with its requirements, design, and operational information throughout its life.
- [CFEngine](https://cfengine.com/) - Configuration management system for automated configuration and maintenance of large-scale computer systems. ([Source Code](https://github.com/cfengine/core))
- [Chef](https://www.chef.io/products/chef-infra) - Configuration management tool using a pure-Ruby, domain-specific language (DSL) for writing system configuration "recipes". ([Source Code](https://github.com/chef/chef))
- [Puppet](https://www.puppet.com/) - Software configuration management tool which includes its own declarative language to describe system configuration. ([Source Code](https://github.com/puppetlabs/puppet))
- [Salt](https://docs.saltproject.io/) - Event-driven IT automation, remote task execution, and configuration management software. ([Source Code](https://github.com/saltstack/salt))
- [CFEngine](https://cfengine.com/) - Configuration management system for automated configuration and maintenance of large-scale computer systems. ([Source Code](https://github.com/cfengine/core))`GPL-3.0``C`
- [Chef](https://www.chef.io/products/chef-infra) - Configuration management tool using a pure-Ruby, domain-specific language (DSL) for writing system configuration "recipes". ([Source Code](https://github.com/chef/chef))`Apache-2.0``Ruby`
- [Puppet](https://www.puppet.com/) - Software configuration management tool which includes its own declarative language to describe system configuration. ([Source Code](https://github.com/puppetlabs/puppet))`Apache-2.0``Ruby/C`
- [Salt](https://docs.saltproject.io/) - Event-driven IT automation, remote task execution, and configuration management software. ([Source Code](https://github.com/saltstack/salt))`Apache-2.0``Python`