Live Demo: http://userdb.meteor.com/
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My first experience building a small app with Meteor framework (http://meteor.com/).

The web app is a simple user database interface(no authorization implemented!).

You can create/delete users, and make them active/inactive. Of course, all changes you make will be reflected in near real-time(due to the nature of Meteor framework). And so if you open two browser windows and add a user you will see the change in both windows almost simultaneously.