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.
With MetaModel, you use a type-safe SQL-like API for querying any datastore. It is a data access framework providing a common interface for exploration and querying of different types of datastores. It isn't a data mapping framework. Instead, it emphasizes abstraction of metadata and the ability to add data sources at runtime, making MetaModel great for generic data processing applications, but less so for applications modeled around a particular domain.
Eidetic is a middleware library for building database driven applications with Perl and Template::Toolkit. It provides handlers for displaying, editing, searching, and administrating data. It provides an interface-generic way of building db apps allowing Web, command line, or daemon styles of interfaces. It is currently used by several applications, including STP, docsys, and rackview.
MyAtom Writer is a graphical tool for creating standard Atom 1.0 documents that embed links to FOAF and OTER documents. A Description component is used to specify descriptions of documents, information regarding the author, and content types. The content type is used to specify whether the Atom document contains links to FOAF and OTER documents. The Entry component is used to enter documents in XML, XHTML, HTML, or text format.
Nuxeo Core is an embeddable document management core, based on Nuxeo Runtime. It provides all the necessary low-level services to define, store, manage, audit, request, and search content. It is the "kernel" of Nuxeo 5 and can also be embedded in third-party applications to provide advanced content management features. It can run on any Java 5 platform, can be easily extended using plug-ins, and implements JCA (Java EE Connector Architecture) to be easily plugged into existing applications or information systems.
Red-Piranha is a search system that can actually learn what you are looking for. It can be used as a Web page, command line, or XML-WebService, so it will work with most languages, including Java, Perl, C#/.NET, and PHP. It includes learning abilities for the Desktop/Internet search functionality. All feedback from the user is stored in (editable) XML and RDF, and is used by the system to improve the quality of searches.