Semaphore
Semaphore is a hosted continuous integration and deployment service for open source and private projects. Its cloud solution helps developers find bugs before they reach users and deliver new features faster.
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Travis-CI
Travis CI is a hosted CI service free for open source communities. It directly integrates with GitHub, BitBucket and many other version control systems, and offers deep support for a variety of languages. Travis also has an Enterprise version that can be installed on your own servers.
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