Deco IDE - Best IDE for building React Native apps

Codacy - Automatically reviews code style, security, duplication, complexity, and coverage on every change while tracking code quality throughout your sprints.

YepCode - The automation & integration tool that loves source code. We help companies to improve their software development experience and solve real problems in a more agile and productive way.

SonarQube - SonarQube, a core component of the Sonar solution, is an open source, self-managed tool that systematically helps developers and organizations deliver Clean Code.

Interview Sandbox - Write code, video chat, and draw in realtime with others.

CodeClimate - Code Climate provides automated code review for your apps, letting you fix quality and security issues before they hit production. We check every commit, branch and pull request for changes in quality and potential vulnerabilities.