This one certainly caught my attention. I have been browsing around for a good MVC framework, and I am playing around with Code Igniter as of the moment. But Stubbles I think definitely deserves some attention. It is fairly new to the whole framework community for PHP 5.x but you should give it a look sometime…
Stubbles is completely different from the approach CakePHP takes. It will not enable you to build CRUD applications in mere minutes. You will have to write a lot more code on your own.
Stubbles is just beginning to grow, so it currently does not offer you all the functionality, that the frameworks you mentioned, offer.
But as we offer the extended reflection support and some nice features when it comes to creating XML, I can still recommend, that you combine the powers of several frameworks. That’s the same approach we will be taking, when using Stubbles in our own projects. We do not aim at replacing these frameworks.
As soon as we finished the basic MVC architecture, we will write some tutorials, to explain how Stubbles can be used to build web applications (which will be mainly built with XSLT).