Lerna
A tool for managing JavaScript projects with multiple packages
...However, this can make testing and tracking changes across repositories quite difficult. As a solution to this, many projects organize their codebases into multi-package repositories. It is Lerna's job to manage these multi-package repositories, optimizing workflow and reducing the time and space requirements for numerous copies of packages in development and build environments.
Lerna's primary functionalities are bootstrap, which links dependencies in the repo together; and publish, which helps publish any updated packages. ...