FW_Cache
Use cache to store frequently accessed data. Cache is just a big array and has one useful feature: it will automatically unset array keys if the php memory is close to full. So it is safe to store in it as much data as you want (of course the maximum allowed by php, by default is ~100Mb).
Introduction
Helpers are classes and functions with useful functionality. Here are built-in helpers that you can use:
FW_Form
A convenient way to create forms. You can create a form class instance and give it three callbacks that control the render, validate and save process.
PHP Helpers
General
JavaScript Helpers
Useful javascript functions and classes. The main helper is fw, an object containing constants, methods and classes. To use these helpers, add fw to your script dependencies:
FW_Settings_Form
The easiest way to create admin settings forms.
CSS Helpers
Useful css classes for admin side. To use these helpers, add fw to your style dependencies:
FW_Flash_Messages
You can display small messages that will be stored on the user's session for exactly one additional request. This is useful when processing a form: you want to redirect and have a special message shown on the next page. These types of messages are called "flash" messages.