It seems every other organization is using Jenkins these days. Jenkins is a continuous integration and continuous delivery server that can be used to automate building, testing, and delivering or deploying software. 

Many organizations also use Puppet for their configuration management needs. Puppet is, if not the de facto configuration management solution, at least one of the most mature and field tested ones. It consists of several server components, agents, a declarative programming language, amongst others. Puppet can be used to install, set up and manage large number of all kinds of resources.