WP MVC is a full-fledged MVC framework, similar to CakePHP and Rails, that developers can use inside of WordPress.
AngularJS for WordPress allows you to easily leverage the power of AngularJS and put it into your theme.
A small and concise plugin framework for rapid application development.
Tina MVC is a WordPress framework that allows you to develop plugins, shortcodes and and widgets.
Provides a foundation and extensions for/to common WordPress developer functions/tasks - creating/installing plugins, complex database queries, etc
Easy integration of CodeIgniter functionality into WordPress, making it available for themes and other plugins.
Easy integration of Zend Framework library into WordPress, making it available for themes and other plugins.
Includes extremely useful widgets for developers and users alike, and is a system written on a PHP 5 object oriented structure.