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.
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.
StelsCSV is a JDBC driver that allows performing SQL statements and other JDBC operations upon text files (comma separated, tab-separated, fixed length, etc.). Using this driver, users can easily create a simple database consisting of plain text files. The driver can be used for writing data importing programs and migration tools. It supports most keywords of ANSI SQL92, table joins, INSERT, UPDATE, and DELETE statements, data types, aggregate, converting, string, and user-defined SQL functions.
SimpleXML is a commandline application and library for very simply manipulating XML files by path to elements and regular expresions identifying data of elements. It lets you harvest data from XML files, change values of attributes, print or change data of elements, create new elements, etc.
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.
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.
SMEWebApp is a framework for constructing Web applications for SMEs (small and medium-sized enterprises, companies, institutions, and organizations). It is built on phpWebApp, and it is higher-level and more specific than phpWebApp. It has some components that can be reused in any application (perhaps with small modifications), like hierarchical menus, user authentication, and user administration. The aim of the project is to make Web application construction for SMEs easier than using VB.
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.
hiberlite provides C++ object-relational mapping for SQLite 3. Its design and API are inspired by the Boost.Serialization, which means there is almost no API to learn. In contrast to most serialization libraries with SQL serializers, C++ objects mapped with hiberlite behave similar to active record patterns: you are not forced to follow the "read all your data/modify some small part/write everything back" path. It is for people who need reliable data storage, ACID transactions, and simple random access to their data files, and don't like coding in SQL.