 <p>Here's what Saki said to me on the <a href="http://www.sencha.com/forum/showthread.php?142761-Sharing-Models-Views-and-Controllers-Between-ExtJS-4-Applications" rel="nofollow">Sencha Forums</a>:</p> <blockquote> <p>The multiple applications on one page, or sub-applications of Ext MVC are not supported yet, however, developers are working on this functionality, AFAIK. Such implementation would most likely solve also the problem of re-using models, views and controllers among (sub) applications, I hope.</p> </blockquote> <p>More specifically regarding linking multiple applications:</p> <blockquote> <p>I would just soft-link files of MVC components is this case. There's no logical or functional connection among them now, only I wanna reuse already written file, right?</p> </blockquote>