Check out a free preview of the full Meteor course:
The "Template Meteor Packages" Lesson is part of the full, Meteor course featured in this preview video. Here's what you'd learn in this lesson:
Chris briefly explores the source code for two Meteor packages, Blaze and Spacebars, to provide some additional resources for learning more about the rendering engine. He also answers a few audience questions about other tempting frameworks and lifecycle methods.