Jenkins - Jenkins is an open-source continuous integration server with 300+ plugins to support all kinds of software development
HARO - HARO, or Help A Reporter Out, is an email service and online database for reporters and experts to get connected.
Travis CI - Focus on writing code. Let Travis CI take care of running your tests and deploying your apps.
PressPitch.io - Connecting journalists with sources, seamlessly!
CircleCI - CircleCI gives web developers powerful Continuous Integration and Deployment with easy setup and maintenance.
Text100 - Text100 offers PR and communication services to connect people with brands.