Express-dust is a project mainly written in JavaScript, it's free.
Express view engine adapter for Dust template engine
Express view engine adapter for Dust template engine.
Express-dust is overwrite the express's original render method because that doesn't support async tempate engines like dustjs. You just require express-dust module and call the response object's render method.
In your app.js:
var expressDust = require('express-dust');
In your handler:
//render the views/user.dust
res.render('user', {title: 'User account', user: user });
You can use all of express's view settings. For example: app.set("view options",{...}) and app.dynamicHelpers({...}), etc.