Following on from our previous post of Inspiring CMS Showoffs I thought I’d compile a list of Web Development Framework showcases.
There are a lot of web development frameworks, but the most established ones you can count on the fingers of one hand, maybe two.
Ruby On Rails
www.rubyonrails.org
Language: Ruby
Ruby on Rails is the hugely popular framework from 37signals, that powers there many web applications, and made open source.

Also: http://www.rubyonrails.org/applications
CakePHP
www.cakephp.org
Language: PHP
CakePHP is a rapid development framework for PHP that provides an extensible architecture for developing, maintaining, and deploying applications.

Camping
http://code.whytheluckystiff.net/camping/
Language: Ruby
Camping is a microframework for web development, by whytheluckystuff, is insanely small and incredibly powerful.

Symphony
www.symfony-project.org
Language: PHP
Symfony is a full-stack framework, a library of cohesive classes written in PHP5. It provides an architecture, components and tools for developers to build complex web applications faster.
Although I couldn’t find a dedicated showcase, the weekly blog update usually contains a few newly launched Symphony powered sites.
CodeIgniter
codeigniter.com
Language: PHP
CodeIgniter is a powerful PHP framework with a very small footprint, built for PHP coders who need a simple and elegant toolkit to create full-featured web applications.

Prado
www.pradosoft.com
Language: PHP
PRADO is a component-based and event-driven programming framework for developing Web applications in PHP 5.

Django
www.djangoproject.com
Language: Python
Django is a high-level Python Web framework that encourages rapid development and clean, pragmatic design.

There are a number of other frameworks (Fusebox, Spring, Turbo Gears to name a few) that I would have liked to include in the list but I was unable to find showcases for them. If you know of some, please let me know and I’ll update the list.