pnpm.io

pnpm is a package manager for JavaScript that aims to improve upon the performance of other package managers like npm and yarn. It does this by reducing duplication of packages in node_modules directories, and using hard links and symlinks to save space on the user's filesystem. pnpm also includes a number of other features and improvements over other package managers, such as support for pluggable package management and the ability to import packages from other package managers.