Jenkins - Jenkins is an open-source continuous integration server with 300+ plugins to support all kinds of software development
Travis CI - Focus on writing code. Let Travis CI take care of running your tests and deploying your apps.
ElectricFlow Build-Test - Information about ElectricFlow Build-Test including independent reviews; ratings. Comparisons; alternatives to ElectricFlow Build-Test from other Build Automation
Buildbot - Python-based continuous integration testing framework
CircleCI - CircleCI gives web developers powerful Continuous Integration and Deployment with easy setup and maintenance.
Codeship - Codeship is a fast and secure hosted Continuous Delivery platform that scales with your needs.