Get all Template Instance of your Meteor application page -

console

getAllTempalteInstances()

getInstance.js

function getAllTempalteInstances(){
  function walkTheDOM(node, func) {
      func(node);
      node = node.firstChild;
      while (node) {
          walkTheDOM(node, func);
          node = node.nextSibling;
      }
  }
  var instances = [];
  walkTheDOM(document.body, function(node) {
    try{
      instances.push(Blaze.getView(node).templateInstance().view.name);
    } catch(err){
      console.error(err)
    }
  });
  return _.uniq(instances)
}