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nvm (Node Version Manager) is a command-line tool that allows developers to install and switch between multiple versions of Node.js on a single machine.

Make (or GNU Make) is a build automation tool that automatically builds executable programs and libraries from source code by reading Makefiles.

asdf is a CLI tool that manages multiple runtime versions with a single configuration file, supporting languages like Node.js, Ruby, Python, and more.

direnv is a shell extension that automatically loads and unloads environment variables based on the current directory. It uses .envrc files to manage project-specific environment configurations.

pyenv is a Python version management tool that allows users to install, switch, and manage multiple Python versions on a single system.