DB2 is a database management system that offers industry leading performance, scalability, and reliability on your choice of platform from Linux to z/OS. Its Web Control Center offers administrators an easy-to-use interface for maintaining databases, and can be run from any Java-enabled Web browser. For Java developers, DB2 UDB for Linux offers support for JDBC and SQLJ, and Net.Data allows for the creation of dynamic data diven Web applications. DB2 UDB for Linux allows you to harness the power of user-defined types and functions and support for Binary Large Objects.
GT.M is a high end platform for developing transaction processing database applications. Individual database files in the terabyte range are supported; a logical database can consist of many files. It provides full support for ACID transactions using a Software Transaction Memory (STM) programming model and optimistic concurrency control. The GT.M data model is hierarchical associative memory (i.e. multi-dimensional arrays) that imposes no restriction on the data types of the indexes or content, nor any restriction on the schema is that imposed by the application. Such databases are also referred to as "document oriented", "schemaless", or "schema-free".
HSQLDB (HyperSQL DataBase) is an SQL relational database engine written in Java. It supports nearly full ANSI-92 SQL and SQL:2008 enhancements. It is a small, fast multithreaded, and transactional database engine which offers in-memory and disk-based tables and supports embedded and server modes.
MaxDB is a re-branded and enhanced version of SAP DB, SAP AG's open source database. It is a heavy-duty, SAP-certified open source database that offers high availability, scalability and a comprehensive feature set. MaxDB is used for large SAP ERP environments and other applications that require maximum enterprise-level database functionality. It is available for a wide range of platforms, including Linux on several different architectures and Windows.
Emdros is a corpus query system for storing and searching linguistically annotated text. It is very generic, supporting almost any kind of annotation from almost any linguistic theory. All linguistic levels of analysis are supported, including phonology, morphology, the lexical level, syntax, and discourse. The core libraries act as a middleware layer between a client and an underlying SQL database. MySQL, PostgreSQL, and SQLite are supported.
libdbi implements a database-independent abstraction layer in C, similar to the DBI/DBD layer in Perl. Writing one generic set of code, programmers can leverage the power of multiple databases and multiple simultaneous database connections by using this framework. The plugin architecture allows for new database drivers to be easily added by a third party with flexible licensing.
Tokyo Cabinet is a library of routines for managing a database. It is the successor of QDBM. Tokyo Cabinet runs very fast. For example, the time required to store 1 million records is 1.5 seconds for a hash database and 2.2 seconds for a B+ tree database. Moreover, the database size is very small. For example, the overhead for a record is 16 bytes for a hash database, and 5 bytes for a B+ tree database. Furthermore, the scalability of Tokyo Cabinet is great. The database size can be up to 8EB.
SAP DB is an open, SQL-based, relational database management system that provides high availability and performance scaling from small to very large implementations. It supports open standards including SQL, JDBC and ODBC, as well as access from Perl, Python, and PHP. SAP DB is platform independent, so users can deploy it for a wide array of projects.