Verdaccio - Verdaccio is a lightweight private npm proxy registry built in Node.js
GitHub Desktop - GitHub Desktop is a seamless way to contribute to projects on GitHub and GitHub Enterprise.
Code Climate for Java - Code quality and test coverage for Java
Git - Git is a free and open source version control system designed to handle everything from small to very large projects with speed and efficiency. It is easy to learn and lightweight with lighting fast performance that outclasses competitors.
Sonatype Nexus Repository - The world's only repository manager with FREE support for popular formats.
Mercurial SCM - Mercurial is a free, distributed source control management tool.