Jenkins - Jenkins is an open-source continuous integration server with 300+ plugins to support all kinds of software development
Sonatype Nexus Repository - The world's only repository manager with FREE support for popular formats.
CircleCI - CircleCI gives web developers powerful Continuous Integration and Deployment with easy setup and maintenance.
Artifactory - The world’s most advanced repository manager.
Travis CI - Focus on writing code. Let Travis CI take care of running your tests and deploying your apps.
packagecloud - Free hosted Node.js, Debian, RPM, Java, Python and RubyGem repositories. Chef, Puppet, Jenkins, Buildkite, CircleCI and Travis CI integrations.