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 small to medium applications, offering a rich set of features and ease of use. In contrast, FuelPHP provides a robust architecture suited for larger applications, with strong security and documentation, but comes with a steeper learning curve.