david is a powerful npm package that helps you discover when your project's dependencies are out of date. It checks against the latest versions on npm and identifies outdated, insecure, or extraneous dependencies. With regular use, david keeps your project dependencies current, improving security and stability. It supports various dependency types including dependencies, devDependencies, and peerDependencies. It can be used via CLI (command-line interface) and the david-dm.org website.