In the php world, I'm aware of a few methods that might qualify as HMVC. They all allow calling a controller and displaying the results from within a view. The calls can be nested infinitly creating widgets within widgets.
- Zend Framework: Action View Helper
- CodeIgniter: 3rd party Modular Extensions - HMVC
- Kohana: 3rd party Component Edit: Kohana 3 now natively supports HMVC
