BuildMaster - BuildMaster Software is an application release automation software that also specializes in release management. It was designed by Inedo, a software development company. Read more about BuildMaster.
Jenkins - Jenkins is an open-source continuous integration server with 300+ plugins to support all kinds of software development
Ansible - Radically simple configuration-management, application deployment, task-execution, and multi-node orchestration engine
ElectricFlow - ElectricFlow is a Release Orchestration platform, that lets teams implement continuous delivery pipeline. 40X faster deployment & 12X faster delivery!
GoCD - Open source continuous delivery tool allows for advanced workflow modeling and dependencies management.
XL Release - XL Release lets you manage, control and visualize continuous delivery pipelines to find and fix problems early and optimize the process.