PNPM

Alexa's Ranking: 614,443

PNPM is yet another npm client that is disk space-efficient. It is claimed that it is up to 2 times faster than NPM and Yarn. Files inside node_modules/ are non-flat and linked from single content-addressable storage. There is built-in support for multiple packages in a repository. It is strict in the sense that the code has no access to arbitrary packages.