Ariadne is a Web Application Framework and Content Management System built with PHP. It allows you to build complex Web applications and sites with ease. It takes care of the mundane stuff like internationalization, security, user management, templating, data retrieval and storage, caching, and site management. It stores content in a structured object store that can be accessed through an extensive filesystem-like API.
The Apache Open For Business Project is an enterprise automation software project that includes ERP, CRM, E-Business/E-Commerce, SCM, MRP, and CMMS/EAM functions. It is a foundation and starting point for enterprise solutions and can certainly be used out of the box, but is also great for creating specialized applications.
The ATK Framework is a PHP business framework. It is targeted at developers who wish to focus on business logic instead of coding HTML. ATK provides a complete framework that requires only small amounts of code to get usable applications, while maintaining full flexibility. ATK has a model driven approach, but is 100% customizable.
MIOLO is a object oriented framework for PHP that offers a range of functions for rapid application development. It allows for the easy modularization of a project and eases the integration between internal and external software modules. It provides objects for distributed database connectivity, and user interfaces can be defined by designers that don't necessarily need to know the intricacies of the business logic through the use of themes. It also provides complete objects for Web forms, data manipulation and presentation, session control, user validation and user access rights.
XEO (eXtensible Enterprise Objects) is an agile development framework designed for creating Web applications built around Object Oriented concepts and Model Driven Development with Java. You model business entities (including their attributes and behavior) as XEO Models which are then processed by the framework's "Builder". This produces the application's supporting structures such as database tables (to persist data) and Java classes (providing object-relational mapping and behavior). Development is supported by an Eclipse plugin called XEOStudio.