Jenkins - Jenkins is an open-source continuous integration server with 300+ plugins to support all kinds of software development
LinkedIn Recruiter - LinkedIn Recruiter is a recruiting tool to hire talent from LinkedIn.
CircleCI - CircleCI gives web developers powerful Continuous Integration and Deployment with easy setup and maintenance.
Breezy.hr - A Modern Hiring Tool for the Entire Team. A uniquely simple, visual hiring tool you and your team will love.
Travis CI - Focus on writing code. Let Travis CI take care of running your tests and deploying your apps.
Greenhouse - Greenhouse Software makes companies great at hiring.