Agile UI is a stand-alone framework that implements all the necessary components to build fully-featured and interractive user interface for your PHP application. Developed by Agile Technologies
License: Open Source
Agile Toolkit is a lightweight and flexible framework ideal for rapid application development, whereas Zend Framework is a comprehensive and mature framework suited for large-scale enterprise applications. Agile Toolkit emphasizes ease of use and rapid prototyping, while Zend Framework offers extensive features and robust security for more complex applications.