foo.js

var _vent = require('./vent.js').shared();

_vent.trigger('blah');

vent.js

var Backbone = require('backbone'); // or any Event/PubSub lib you prefer
var _vent = null;

module.exports = {
    shared: function () {
        if (!_vent) {
            _vent = _.extend({}, Backbone.Events);
        }
        return _vent;
    }
}