Big brands are using Node.js

http://www.bacancytechnology.com/blog/why-choose-mean-stack-for-next-web-development-project

https://www.dynatrace.com/blog/node-js-is-hitting-the-big-time-in-enterprise-markets/

http://www.infoworld.com/article/2937159/application-development/mean-vs-lamp-your-next-programming-project.html

Login

Rendering

pugjs (Jade)

doctype html
html(lang="en")
  head
    title= pageTitle
    script(type='text/javascript').
      if (foo) bar(1 + 5)
  body
    h1 Pug - node template engine
    #container.col
      if youAreUsingPug
        p You are amazing
      else
        p Get on it!
      p.
        Pug is a terse and simple templating language with a
        strong focus on performance and powerful features.

Handlebars

Handlebars.registerHelper('link', function(text, options) {
  var attrs = [];

  for (var prop in options.hash) {
    attrs.push(
        Handlebars.escapeExpression(prop) + '="'
        + Handlebars.escapeExpression(options.hash[prop]) + '"');
  }

  return new Handlebars.SafeString(
    "<a " + attrs.join(" ") + ">" + Handlebars.escapeExpression(text) + "</a>"
  );
});

EJS

        <!-- LOCAL INFORMATION -->
        <div class="col-sm-6">
            <div class="well">
                <h3><span class="fa fa-user"></span> Local</h3>

                <% if (user.local.email) { %>
                    <p>
                        <strong>id</strong>: <%= user._id %><br>
                        <strong>email</strong>: <%= user.local.email %><br>
                        <strong>password</strong>: <%= user.local.password %>
                    </p>
                    
                    <a href="/unlink/local" class="btn btn-default">Unlink</a>
                <% } else { %>
                    <a href="/connect/local" class="btn btn-default">Connect Local</a>
                <% } %>

            </div>
        </div>

        <!-- FACEBOOK INFORMATION -->
        <div class="col-sm-6">
            <div class="well">
                <h3 class="text-primary"><span class="fa fa-facebook"></span> Facebook</h3>

                <!-- check if the user has this token (is the user authenticated with this social account) -->
                <% if (user.facebook.token) { %>
                    <p>
                        <strong>id</strong>: <%= user.facebook.id %><br>
                        <strong>token</strong>: <%= user.facebook.token %><br>
                        <strong>email</strong>: <%= user.facebook.email %><br>
                        <strong>name</strong>: <%= user.facebook.name %><br>
                    </p>

                    <a href="/unlink/facebook" class="btn btn-primary">Unlink</a>
                <% } else { %>
                    <a href="/connect/facebook" class="btn btn-primary">Connect Facebook</a>
                <% } %>

            </div>
        </div>
    </div>
    <div class="row">

        <!-- TWITTER INFORMATION -->
        <div class="col-sm-6">
            <div class="well">
                <h3 class="text-info"><span class="fa fa-twitter"></span> Twitter</h3>

                <% if (user.twitter.token) { %>
                    <p>
                        <strong>id</strong>: <%= user.twitter.id %><br>
                        <strong>token</strong>: <%= user.twitter.token %><br>
                        <strong>display name</strong>: <%= user.twitter.displayName %><br>
                        <strong>username</strong>: <%= user.twitter.username %>
                    </p>

                    <a href="/unlink/twitter" class="btn btn-info">Unlink</a>
                <% } else { %>
                    <a href="/connect/twitter" class="btn btn-info">Connect Twitter</a>
                <% } %>

            </div>
        </div>

https://www.quora.com/Whats-the-best-view-engine-for-node-js-ejs-jade-or-handlebars