express-naked-redirect
expressNakedRedirect is a middleware for Express that redirects naked(root domain) request to www or its reverse.
follow-redirect-url
A simple command-line utility that lets you follow redirects to see where http URLs end up. Useful for shortened URLs.
clean-redirect
Enforce HTTPS, www to naked domains, remove trailing slash, to lower case, and your own custom redirect logic, all in one single redirect.
punycode
A robust Punycode converter that fully complies to RFC 3492 and RFC 5891, and works on nearly all JavaScript platforms.