React Native Desktop - Build OS X desktop apps using React Native
Jenkins - Jenkins is an open-source continuous integration server with 300+ plugins to support all kinds of software development
Arbiter IDE - The offline-friendly, in-browser IDE for pure JS prototypes
CircleCI - CircleCI gives web developers powerful Continuous Integration and Deployment with easy setup and maintenance.
CodeOnline - A remote and secure workspace powered by VSCode
Travis CI - Focus on writing code. Let Travis CI take care of running your tests and deploying your apps.