If you’re an Ember developer, you should check out my new package ember-notification-hub. It allows you to drop in a notification center into your app which will show in-progress and completed tasks.
It is super useful for any asynchronous calls your app needs to make:
Any completed notifications will hang around in local storage so users can see what actions took place between application restarts. It comes with a few animations and takes minimal dependencies. This hub is currently used in the VMPower dashboard.