HackenProof - The world trusted Bug Bounty Platform for crypto projects
Jenkins - Jenkins is an open-source continuous integration server with 300+ plugins to support all kinds of software development
Cybrary - Free courses in cyber security
CircleCI - CircleCI gives web developers powerful Continuous Integration and Deployment with easy setup and maintenance.
CYREX - Web security vulnerability assessment & penetration testing
Travis CI - Focus on writing code. Let Travis CI take care of running your tests and deploying your apps.