db4o is an object database for Java and all .NET environments. Its features include ACID transactions, automatic class schema recognition, query-by-example, a S.O.D.A. object querying API, native queries, LINQ support on .NET, callback methods, memory files, cascade-on-delete, multi-threaded access, and Java Webstart and servlet support.
PostGIS adds support for geographic objects to the PostgreSQL object-relational database. In effect, PostGIS "spatially enables" the PostgreSQL server, allowing it to be used as a backend spatial database for geographic information systems (GIS), much like ESRI's SDE or Oracle's Spatial extension.
Ora2Pg is a Perl module to export an Oracle database schema to a PostgreSQL compatible schema. It connects your Oracle database, extracts its structure, and generates an SQL script that you can load into your PostgreSQL database. It dumps the database schema (tables, views, sequences, indexes, grants) with primary, unique, and foreign keys into PostgreSQL syntax without editing the SQL code generated. It also dump Oracle data into PostgreSQL DB as online process or into a file. You can choose what columns can be exported for each table.
hamsterdb Embedded Storage is an embedded database engine written in ANSI-C. It includes B+Trees with variable length keys and records. It supports in-memory databases and endian-independent files, database cursors, multiple databases in one file, "record number" databases, and duplicate keys. hamsterdb is very fast and highly configurable. It compiles and runs on Unix platforms, Linux, Microsoft Windows, and Windows CE.
XMLToaster is a tool for extracting and loading XML from databases. It provides a modified version of SQL which has XML mapping extenstions. It can be compared to the "for xml" command in MS SQL Server 2008, but it runs on all common databases and scales to handle very large XML mappings without too much complexity. It is used as a Java library to write XML interfaces, but can also be run as a command line tool.
SQL Power DQguru is an easy-to-use data cleansing and de-duping tool. The user interface puts a strong emphasis on straightforward visualization of your data and processes. It will help you cleanse your data, validate and correct addresses, and identify and remove duplicate records. Thus, you can provide your business users with complete and accurate data, and a single view of each customer, product, sales rep, and business unit.
odbcpp is an ODBC C++ library wrapper. The ODBC library itself is a low level C library that has many functions, all of which could return errors. This wrapper checks for errors on every single call to the ODBC interface, so if an SQL statement, a connection, or anything else fails, an exception is generated.
Relational is an interface to load relations from a file, to write relational algebra queries, and to see their result. This software has educational purposes, since it makes it possible to immediately evaluate if a query is correct or not. For developers, it provides a relational algebra Python module which can be used within other projects.
Riteway-Reorgs is a Tcl/TK GUI and Batch program to reorganize ISAM data files that are exclusive to the Synergy/DE product of Synergex International Inc. It lets you maintain peak Synergy/DE ISAM file and application performance. It requires an operational installation of Synergy/DE. It is built as a Tcl DevKit wrapped stand-alone executable, and requires the ActiveState Tcl DevKit to build.