MVC: Indicates whether the framework comes with inbuilt support for a Model-View-Controller setup.
Multiple DB's: Indicates whether the framework supports multiple databases without having to change anything.
ORM: Indicates whether the framework supports an object-record mapper, usually an implementation of ActiveRecord.
DB Objects: Indicates whether the framework includes other [color=blue! important]database [color=blue! important]objects, like a TableGateWay.
Templates: Indicates whether the framework has an inbuilt template engine.
Caching: Indicates whether the framework includes a caching object or some way other way of caching.
Validation: Indicates whether the framework has an inbuilt validation or filtering component.
Ajax: Indicates whether the framework comes with inbuilt support for Ajax.
Auth Module: Indicates whether the framework has an inbuilt module for handling user authentication.
Modules: Indicates whether the framework has other modules, like an [color=blue! important]RSS [color=blue! important]feed parser, PDF module or anything else (useful).