Solid and extensible jQuery plugins

alien.js

// Top namespace
if( !window.Alien ){
  var Alien = {"version": "1.0"};
}

// Constructor
Alien.Ship = function(context, options){
  var self = this;
  self.context = context;

  self.settings = {
    width: 800,
    height: 600
  };

  if(options){
    jQuery.extend(self.settings, options);
  }

  self.initialize();
};

// Prototype
Alien.Ship.prototype = {
  initialize: function(){
    var self = this;

    // Bind some events
    self.context.bind('width-changed', function(evt, data){
      self.handle_width(data);
    });

    self.context.bind('height-changed', function(evt, data){
      self.handle_height(data);
    });

    // Do some initialization
    self.context.css('background-color', 'gray');
  },

  handle_width: function(data){
    var self = this;
    self.settings.width = data.width;
  },

  handle_height: function(data){
    var self = this;
    self.settings.height = data.height;
  }
};

// jQuery plugin
jQuery.fn.AlienShip = function(options){
  return this.each(function(){
    var context = jQuery(this);
    var ship = new Alien.Ship(context, options);
    context.data('AlienShip', ship);
  });
};

// Call it
jQuery('.car').AlienShip({width: 1024, height: 800});

// Access it
jQuery('.car').data('AlienShip');

// Extend it
Alien.Ship.prototype.handle_width = function(data){
  var self = this;
  self.settings.width = data.width / 2;
};