Emblem.js is an indentation-based templating language that compiles to the same format as Handlebars templates, and is therefore fully compatible with Ember.js. This Embercast goes over the basics of Emblem syntax and how to start writing Emblem.js templates for your Ember apps.
The code for this Embercast is based off of the Ember Starter Kit, so no installation is necessary other than cloning the repo and opening index.html from your browser.