CodeIgniter : Framework para desarrollar aplicaciones Web en PHP

CodeIgniter es en framework para el desarrollo de aplicaciones web en php. Sus autores lo destacan por su simpleza, facildiad de aprendizaje, y aceleracion en el desarrollo.
Vale la pena pegarle un vistazo :

http://codeigniter.com/

Scriptcase: framework para aplicaciones en PHP y Ajax

Scriptcase es un framework para el desarrollo de aplicaciones web con php y ajax. No es gratis. Sus creadores afirman que se pueden reducir costos y tiempos en el desarrollo de aplicaciones web, ademas de que la curva de aprendizaje es muy baja.


http://www.scriptcase.net

Libro: PHP and Ajax

Buen libro ...


AJAX and PHP: Building Responsive Web Applications:
http://ajaxphp.packtpub.com/index.htm

Catharsis Web application framework

Catharsis provides complete Guidance, which can help you:
1) create solution (all needed libraries)
2) create all needed classes for every Entity object
Catharsis has real multi tier structure
+ Entity: Layer with business objects (person, position, contract, supplier)
+ Common: Interface gathering layer. Every upper tier has its interfaces published here.Also Factories are stored here (DaoFactory, FacadeFactory, ModelFactory, ControllerFactory)Same applies to Providers - Role, Membership, ResourceManager, GlobalizationManager ...
+ Data: Every entity has its Dao (data access object). And data layer with these daos is the only gate, which can access the storage (DB) -> Almost everything is done by NHibernate :)
+ Business: The key middle tier with Business rules, access rights, checking, AOP filters ... all of them are applied here.
+ Model: Containers for data exchange for MVC pattern.
+ Controllers: These powerful objects has only one purpose! correctly fill Models and therefore communicate with Business layer.
+ UI-WEB: Presenters which are responsible for displaying the data stored in Models, and process user requests.Every layer is based on inheritance and encapsulation. Base classes cover must of the needed methods.Implementation is therefore very simple ...

http://www.codeplex.com/Catharsis/