Optimizely - A/B testing you'll actually use.
Ansible - Radically simple configuration-management, application deployment, task-execution, and multi-node orchestration engine
Dynamic Yield - Personalization & customer experience management
Jenkins - Jenkins is an open-source continuous integration server with 300+ plugins to support all kinds of software development
AB Tasty - AB Tasty is an all-inclusive platform for conversion rate optimization, personalization, customer activation, and testing.
Puppet Enterprise - Get started with Puppet Enterprise, or upgrade or expand.