GitLab - Create, review and deploy code together with GitLab open source git repo management software | GitLab
Jenkins - Jenkins is an open-source continuous integration server with 300+ plugins to support all kinds of software development
CircleCI - CircleCI gives web developers powerful Continuous Integration and Deployment with easy setup and maintenance.
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.
Codeship - Codeship is a fast and secure hosted Continuous Delivery platform that scales with your needs.
Bitrise - Tens of thousands of agencies, startups and enterprise companies with mobile apps - including Runkeeper, Grindr, Duolingo and more - use Bitrise to automate their way to increased productivity & speed