* [Buildbot](http://buildbot.net/) - Python-based toolkit for continuous integration.
* [CapsuleCD](https://github.com/AnalogJ/capsulecd) - CD script for automating package/library releases (npm, cookbooks, gems, pip, jars, etc).
* [concourse](http://concourse.ci/) - A modern tool to gain visibility on the CI/CD pipeline. The flexible, declarative DSL is easy to learn and powerful to use.
* [Drone](https://github.com/drone/drone) - Continuous integration server built on Docker and configured using YAML files.
* [GitLab CI](https://about.gitlab.com/gitlab-ci/) - Based off of ruby. They also provide GitLab, which manages git repositories.
- [CapsuleCD](https://analogj.github.io/capsulecd-slides/) - CD script for automating package/library releases (npm, cookbooks, gems, pip, jars, etc). ([Source Code](https://github.com/AnalogJ/capsulecd)) `MIT``Go`
- [Concourse](https://concourse.ci/) - Concourse is a CI tool that treats pipelines as first class objects and containerizes every step along the way. ([Demo](https://ci.concourse.ci/), [Source Code](https://github.com/concourse/concourse)) `Apache-2.0``Go`
- [drone](https://drone.io/) - Drone is a Continuous Delivery platform built on Docker, written in Go. ([Source Code](https://github.com/drone/drone)) `Apache-2.0``Go`
- [Factor](http://www.factor.io/) - Programmatically define and run workflows to connect configuration management, source code management, build, continuous integration, continuous deployment and communication tools. ([Source Code](https://github.com/factor-io/factor)) `MIT``Ruby`
- [GolangCI](https://golangci.com/) - Open Source automated code review service for Go integrated with GitHub pull requests. ([Source Code](https://github.com/golangci/golangci)) `AGPL-3.0``Go`
- [PHP Censor](https://github.com/php-censor/php-censor) - Open source self-hosted continuous integration server for PHP projects. `BSD-2-Clause``PHP`
- [PHPCI](https://www.phptesting.org/) - Free and open source continuous integration specifically designed for PHP. ([Source Code](https://github.com/block8/phpci)) `BSD-2-Clause``PHP`