Itzam is an embedded database engine that creates and manipulates files containing keyed-access records. Information is referenced by a user-defined key value, and one or more indexes (hash, B-tree, or matrix) may be combined with or separated from data. Itzam is deliberately portable and designed as a foundation for other languages (C++, Python, and Java).
The goal of the Database Template Library is to make ODBC recordsets look just like an STL container. As a user, you can move through containers using standard STL iterators, and if you insert(), erase(), or replace() records in the containers, changes can be automatically committed to the database for you. The library's compliance with the STL iterator and container standards means you can plug the abstractions into a wide variety of STL algorithms for data storage, searching, and manipulation. In addition, the C++ reflection mechanism used by the library to bind to database tables allows generic indexing and lookup properties to be added to the containers with no special code required from the enduser. Because the code takes full advantage of the template mechanism, the library adds minimal overhead compared with using raw ODBC calls to access a database.
YASQL is an open source Oracle command line interface. It features a much kinder user interface than SQL*Plus (sqlplus). This is meant to be a complete replacement for SQL*Plus when dealing with ad hoc queries and general database interfacing. It adds features such as full ReadLine support for command history and tab completion, alternate output methods, table, list, CSV, redirection and piping of query results, query editing, scripting, and easy administrative data dictionary commands.
StelsDBF is a DBF JDBC type 4 driver that allows the user to perform SQL queries and other JDBC operations on DBF files (such as those used by dBase III/IV/V, xBase, and FoxPro). The driver is completely platform-independent and does not require installing additional client or server software to provide access to DBF files. It can be effectively used to create, process, and export DBF databases in your Java applications. It supports most keywords of ANSI SQL'92; inner and outer table joins; CREATE, INSERT, UPDATE and DELETE statements; transactions; aggregate, numeric, and string conversion; and user-defined SQL functions.
MaVerick is a MultiValue database management system. MultiValue databases are said to be one of the computer industry's best kept secrets. First appearing over 30 years ago as PICK, they have continued to evolve through various commercial vendors, and are still in active development today. They are very resource friendly, are incredibly fast, feature a very user friendly data retrieval and reporting language (variously called ACCESS or English), and a rapid application development language based originally on Dartmouth Basic. The MaVerick project is an attempt to create an open source variant, written in Java.
The GNU Enterprise Application Server (GEAS), one of the foundations of the GNUe Project, provides a means for managing and deploying multi-tier business applications. Its architecture encourages reusability and easy maintenance by presenting data as objects and business logic as methods to clients written in several popular programming languages.