CodeIgniter

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. Further development available via GitHub: https://github .

Free Open Source Mac OS X Windows Linux Self-Hosted

Symfony

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

Free Open Source Mac OS X Windows Linux Web PHP

Yii Framework

Yii is a high-performance component-based PHP framework best for Web 2.0 development. Yii comes with rich features: MVC, DAO/ActiveRecord, I18N/L10N, caching, authentication and role-based access control, scaffolding, testing, etc.

Free Open Source Mac OS X Windows Linux Web

Zend Framework

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.

Free Open Source Mac OS X Windows Linux Web

CakePHP

CakePHP is a rapid development framework for PHP that provides an extensible architecture for developing, maintaining, and deploying applications.

Free Open Source Mac OS X Windows Linux Web Self-Hosted PHP

Nette Framework

Nette Framework is a popular tool for PHP web development. It is designed to be the most usable as possible and is definitely one of the safest one. It speaks your...

Free Open Source Mac OS X Windows Linux Web Self-Hosted

Akelos

Port of Ruby on Rails development framework and designed to work for PHP4 and PHP5. The Akelos PHP Framework is a web application development platform based on the MVC...

Free Open Source Mac OS X Windows Linux

bitcore

A pure and powerful JavaScript Bitcoin library or blockchain library.

Free Open Source Windows Linux Mac JavaScript

TomP2P

A P2P-based high performance key-value pair storage library.

Free Open Source Mac OS X Windows Linux