Heyjade is a project mainly written in JavaScript, it's free.
My pedagogic path into the Jade template engine
My own "path of understanding" of how the Jade template engine is utilized in the Express framework.
As that grows, there will be more "Steps" added as commits.
See detailed explanation: http://awebfactory.com.ar/node/473
For stuff not yet covered here, like forms, check out https://github.com/victorkane/lit