CSS Scan - Instantly check or copy computed CSS from any element for only ~95$
Jenkins - Jenkins is an open-source continuous integration server with 300+ plugins to support all kinds of software development
Hoverify - All-in-one browser extension to improve your web dev experience.
CircleCI - CircleCI gives web developers powerful Continuous Integration and Deployment with easy setup and maintenance.
CSS Grab n' Go Editor - Visual editor for learning and quick CSS mocking
Travis CI - Simple, flexible, trustworthy CI/CD tools. Join hundreds of thousands who define tests and deployments in minutes, then scale up simply with parallel or multi-environment builds using Travis CI’s precision syntax—all with the developer in mind.