node-bin-gen is a tool for generating a node binary package and its corresponding platform-specific packages, allowing users to install Node.js as an npm package. It's designed for developers who want to manage Node.js installations via npm, particularly useful for testing pre-release versions or environments where traditional Node.js installation methods aren't feasible. The tool requires npm@>=3 and generates a metapackage that installs the main Node.js binary along with platform-specific dependencies.