Free Software for PHP
Adminer
Adminer provides administrators, developers and website maintainers with a full-featured database management tool written in PHP. With Adminer you can to a database servers with username and password. List fields, indexes, foreign keys and triggers of table. Change name, engine, collation, auto_increment and comment of table. Alter name, type, collation, comment and default values of columns. Create, alter and drop indexes, foreign keys, select form view and call stored procedures and functions. The software is distributed under the Apache License which makes it free and open-source. Adminer supports a wide variety of relational and NoSQL databases including MySQL, MariaDB, PostgreSQL, SQLite, MS SQL, Oracle, Firebird, SimpleDB, Elasticsearch and MongoDB.
Saaze
An all-inclusive, flat-file CMS for simple and fast content management. While regular content management systems like WordPress are great, the complexity of running sush a site can easily become a burden. They also have a larger attack vector due to popularity and the fact that they utilize a relation database mangement system to serve and manage the content. Saaze is fundamentally different, the flat-file architecture of Saaze makes hosting content for the web easy to manage, secure and fast to load.
Elgg
Elgg is an award-winning open source social networking engine that provides a robust framework on which to build all kinds of social environments, from a campus wide social network for your university, school or college or an internal collaborative platform for your organization through to a brand-building communications tool for your company and its clients.
HumHub
HumHub is a free and open-source social network software and framework built to give you the tools to make communication and collaboration easy and successful. HumHub is designed to be lightweight, powerful and comes with an user-friendly interface that is easy to use both for users of the social network and administrators.
Nubo
Nubo is a self-hosted file sharing application that runs on macOS, Linux and Windows (64-bit versions only). The application consists of two parts, a cloud-base part which is s mall PHP application that must be installed on a server, and the client which can should be installed on your local machne to be able to syncronise and share with the cloud. In that sense Nubo is similar to other file sharing solutions in that you drop files into a special folder on your computer to save and sync with cloud instance.
Yii Framework
Yii is a fast, secure, and efficient framework written in PHP. The framework is flexible yet pragmatic and works right out of the box with resanable defaults. With the Yii framework you can write more code in less time with simple with a powerful APIs and that include terminal commands for code generation for quick skaffolding. Yii is released as free and open source software under the liberal MIT License.
Symfony
Symfony is a reusable set of standalone, decoupled and cohesive PHP components that solve common web development problems. Instead of using these low-level components, you can use the ready-to-be-used Symfony full-stack web framework, which is based on these components, or you can create your very own framework. Symfony is released as a free and open source framework under the MIT License.
ZPanel
ZPanel is a free web hosting control panel for macOS, Linux and Windows-based servers. With ZPanel it's easy to manage your server for web hosting related tasks such as setting up server environments, managing DNS reccords and configuring SMTP. The software is written in PHP and released as open source software under the GNU General Public License 3.0.
Laravel
Laravel is an extremely popular, free and open source web application framework with expressive, elegant syntax. The framework is written in PHP and provides a developer experience that rival most web application frameworks on the market today. The structure and built-in features of Laravel allows developers to build web applications faster. Instead of setting up tooling and configuring settings, developers can focus on the important task at hand, making their ideas into reality.
Zend Framework
Zend Framework is a web application framework written in PHP that has an open architecture based on middleware or MVC which follows PHP-FIG standards. The framework is designed to follow the best security practices and stores passwords using bcrypt and encrypts data with AES-256. Zend Framework consists of multiple PHP packages that are designed to run separately or work interchangeably together. With Zend Framework you can develop web applications and services using PHP 5.6+, while writing 100% object-oriented code, broad spectrum of PHP specific features.