node-notifier
A Node.js module for sending notifications on native Mac, Windows (post and pre 8) and Linux (or Growl as fallback)
gulp-notify
gulp plugin to send messages based on Vinyl Files or Errors to Mac OS X, Linux or Windows using the node-notifier module. Fallbacks to Growl or simply logging
simple-notify
Simple Notify is a pure Javascript library to show nice and customizable alert notifications.