Travis CI - Focus on writing code. Let Travis CI take care of running your tests and deploying your apps.
Jenkins - Jenkins is an open-source continuous integration server with 300+ plugins to support all kinds of software development
JetBrains TeamCity - TeamCity is a continuous integration and build management system.
Chef - Automation for all of your technology. Overcome the complexity and rapidly ship your infrastructure and apps anywhere with automation.
Bamboo - Bamboo is a continuous integration and deployment tool that ties automated builds, tests and releases together in a single workflow.
Ansible - Radically simple configuration-management, application deployment, task-execution, and multi-node orchestration engine