Ansible - Radically simple configuration-management, application deployment, task-execution, and multi-node orchestration engine
Unimus - Unimus is a Network Automation and Configuration management solution designed for fast deployment network-wide and ease of use. Unimus does not require learning any abstraction or templating languages, and does not require any coding skills.
Jenkins - Jenkins is an open-source continuous integration server with 300+ plugins to support all kinds of software development
GenieACS - A fast and lightweight TR-069 Auto Configuration Server (ACS)
Puppet Enterprise - Get started with Puppet Enterprise, or upgrade or expand.
Oxidized - configuration backup software (IOS, JunOS) - silly attempt at rancid