Yii Framework!

PHP (version 4 or 5) framework with a thin model layer. Includes an ActiveRecord class for database agnostic (mostly) data retrieval. Good community support in its forums.

Ruby on Rails is an open source full-stack web application framework for the Ruby programming language. Rails is a full-stack framework, meaning that it gives the Web developer the full ability to gather information from the web server, talking/querying the database, and template rendering out of the box.

Symfony is a set of reusable PHP components and a PHP framework for web projects.

ImpressPages is a PHP framework with admin panel. A new MVC engine is under the hood so you can customize ImpressPages in no time. Write your own plugins and themes to suit your and customers’ needs best. Both website layout and administration interface are user friendly and simply gorgeous.

Extending the art & spirit of PHP, Zend Framework is based on simplicity, object-oriented best practices, corporate friendly licensing, and a rigorously tested agile codebase. Zend Framework is focused on building more secure, reliable, and modern Web 2.0 applications & web services, and consuming widely available APIs from leading vendors like Google, Amazon, Yahoo!, Flickr, as well as API providers and cataloguers like StrikeIron and ProgrammableWeb.

Agile Toolkit is a PHP framework for developing Web User Interfaces. Inspired by desktop GUI it provides a full object-oriented foundation for Business and Presentation logic of your web software. Agile Toolkit is notable for it's simple of use and development efficiency.

Fuel is a simple, flexible, community driven PHP 5.3 web framework based on the best ideas of other frameworks with a fresh start and a design pattern in HMVC.

FAT-FREE is a powerful yet lightweight PHP 5.3+ Web development framework designed to help you build dynamic and robust applications - fast!

Silex - The PHP micro-framework based on Symfony2 Components

(Wikipedia) Phalcon is a high-performance PHP web framework based on the model–view–controller (MVC) pattern. Originally released in 2012, it is an open-source framework licensed under the terms of the BSD License.

Pedestal is a web application framework written in Clojure that aims to bring both the language and its principles to client and server-side development.

A pure and powerful JavaScript Bitcoin library or blockchain library.