Mentioned in summary Zend-based core was started during my work at Cybertone. Today I support and develop one project based on it. I wanted to publish full source code, but 3-4 years ago it was not good enough to be shared, and now it looks a bit outdated in matter of used frameworks (Zend Framework 1.12.0, Prototype JS 1.7.1).
I support "thin controller" idea and main business logic is implemented in models. Every model consists of Db layer, Entity transfer object, Db and Form data adapters and Manager that makes all the main work. In Db layer Zend_Db_Adapter is used and for all data selects I use Zend_Db_Select. I do not use Zend_Db_Table/Row, instead Entities are used. Entity is just a simple
transfer object, usually represents table row, but also has some additional properties and provides fluent interface to access related Entities.
The way it works is pretty simple and I managed to introduce it in at least two teams in very short time. It is also project-independent and could be used in any existing Zend-based project.
Recently I made important upgrade of back-end part of Core. Now it successfully utilizes Redis and NodeJS to have event-based (with Redis pub/sub) communications among different entities. The project is still based on PHP/Zend/Mysql but some heavy work (like counters, caching, cascaded updates) is now done with Node and Redis (and sometimes PHP callbacks made by Node). The
it works is pretty interesting and I will be happy to share it.
Actually, I implemented the loader, that works in very similar way to very popular RequireJS library. First version was written about 6 years ago and that time we did not have such a big variety of good and simple libs. Even jQuery was pretty bad comparing to PrototypeJS that time.
All components communicate using native DOM events only, therefore it is very easy to add new components, load them dynamically and communicate with others. In addition to pure front-end components, there are plenty of components, that work together with my custom Zend Form Elements.
I can say that even being the part of my core, it still could be used outside of it - once I took some main JS core files and components and easily integrated them with a Magento project (it uses Prototype).
For all my new projects I, of course, use all these new libraries (like RequireJS, Underscore, jQuery, Async, and many more), still keeping similar way and architecture, just using different libraries.