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Top : Software : Databases : Relational

12 of the Best Free Git Books
Git is the most widely used version control system, in part because of the popularity of GitHub, a web-based Git repository hosting service, which offers all of the distributed revision control and source code management) functionality of Git as well as adding its own features.

(Read more)
MixZing is an advanced music player for the Android platform. It also has limited support to play video files.


  • DB2 for Linux
    (commercial) The world most trusted relational database for applications ranging from business intelligence to e-business. The availability of DB2 Universal Database on Linux enables developers to combine the power of Linux with the performance and robustness of DB2. Read more hot
  • IBM Informix
    (commercial) IBM Informix provides Linux developers with the full power of an SQL-based database engine, combined with the quality, configurability, and interoperability of the Linux operating system. hot
  • MaxDB
    MaxDB is a heavy-duty, SAP-certified open source database for OLTP and OLAP usage which offers high reliability, availability, scalability and a very comprehensive feature set. It is targetted for large mySAP Business Suite environments and other applications that require maximum enterprise-level database functionality and complements the MySQL database server. hot
  • MySQL
    The MySQL database server is the world's most popular open source database. Over six million installations use MySQL to power high-volume Web sites and other critical business systems including industry-leaders like The Associated Press, Yahoo, NASA, Sabre Holdings and Suzuki. Read more hot
  • Oracle
    (commercial) Oracle Database 10g is the first database designed for enterprise grid computing, the most flexible and cost-effective way to manage enterprise information. It cuts costs of management while providing the highest possible quality of service. In addition to providing numerous quality and performance enhancements, Oracle Database 10g significantly reduces the costs of managing the IT environment, with a simplified install, greatly reduced configuration and management requirements, and automatic performance diagnosis and SQL tuning. These and other automated management capabilities help improve DBA and developer productivity and efficiency. hot
  • PostgreSQL
    PostgreSQL is a highly-scalable, SQL compliant, open source object-relational database management system. With more than 15 years of development history, it is quickly becoming the de facto database for enterprise level open source solutions. Read more hot
    Adabas is Software AG?s advanced database management system that delivers high transaction throughput while ensuring integrity and flexibility. Adabas is a high-performance database for large, mission-critical applications. It is specifically designed to support thousands of users in parallel while giving sub-second response times.
  • Birdstep's RDM Embedded
    (commercial) Birdstep's RDM Embedded is a high performance, small footprint embeddable data management solution designed for today's complex, interconnected application-specific systems.
  • Cego
    Cego implements a relational and transactional database system with support for the SQL query language.
  • Coral
    The objective of the CORAL project is to develop a robust and efficient deductive database system, and to investigate its use in various application domains. Coral is a deductive system which supports a rich declarative language, and an interface to C++ which allows for a combination of declaritive and imperative programming. The declarative query language supports general Horn clauses augmented with complex terms, set-grouping, aggregation, negation, and relations with tuples that contain (universally quantified) variables. A CORAL declarative program can be organized as a collection of interacting modules.
  • db++
    A relational DBMS with the interfaces a la Carte.
  • dbXML
    A DBMS written to optimize the storage, retrieval, querying and relational management of XML-based documents.
  • Drizzle
    Drizzle is a lightweight SQL Database optimised for Cloud and network applications. It is a high-performance microkernel database management system (DBMS) for scale-out applications. Read more
  • Easysoft SQLEngine
    A relational database engine to provide Linux users with heterogeneous access to multiple local and remote data source.
  • Empress RDBMS
    (commercial) A fast, reliable database management system featuring: Small footprint, Kernel and SQL Interface Routines, Fast Bulk Data Handling, and bulk chunks.
  • Firebird Relational Database
    Firebird is a relational database offering many ANSI SQL-99 features that runs on Linux, Windows, and a variety of Unix platforms. Firebird offers excellent concurrency, high performance, and powerful language support for stored procedures and triggers. It has been used in production systems, under a variety of names since 1981.
  • FlagShip
    (commercial) A database development and porting system for moving xBase based languages to UNIX. It is also a highly optimized 4GL language, syntactically compatible to other XBase dialects, like dBase, Clipper, Fox etc.
  • Flora
    Flora is a minimalistic but very powerful NoSQL database which is easy to understand, flexible and Lua-scriptable.
  • GNOME Transcript
    A SQL Database Client with plugin support to provide access to multiple database servers.
  • GNU SQL Server
    SQL Server is a free portable multiuser relatational database management system. It supports the full SQL89 dialect and has some extensions from SQL92. It provides multiuser access and transaction isolation based on predicative locks. The working OS: UNIX. The working language: C . It also uses RPC, shared memory and message queues.
  • HailDB
    HailDB is a relational database in shared library form that can be embedded into applications. It is not a SQL database, although you can use this library as the storage backend for a SQL database.
  • HampusDB
    HDB is a small, flexible, and efficient hierarchical database. It comes with a wide range of command line utilities for manipulating and extracting data. It is designed for both embedded and bigger systems. It currently has interfaces to C, C++, Java, and Perl.
  • InfiniDB Community Edition
    InfiniDB Community Edition is a scale-up, column-oriented database for data warehousing, analytics, business intelligence, and read-intensive applications.
  • Ingres
    Ingres is a proven, high-performance open source relational database solution that offers the scalability, integration and flexibility to leverage information resources across a wide range of platforms, including Linux, UNIX, Windows and OpenVMS. Ingres is a robust RDBMS that has thirty years of industrial-strength experience with commercial use in mission-critical applications. Read more
  • Interbase
    (commercial) Designed for use in situations where there is no database administrator or IT support, InterBase is powerful enough to support mission-critical applications, yet compact enough to run on very modest systems.
  • jBASE
    jBASE offers a suite of database management products and development tools. jBASE, the flagship product, provides a multidimensional database, a development environment including a development language, and a middleware component allowing other mainstream and standards-based products to communicate with the jBASE products.
  • KekeDB
    A simple database server using SQL like query language. It's based on Berkley DB .
  • LEAP
    LEAP is a free Relational Database Management System. It is designed as an educational tool to help students, and assist researchers and teachers. It is as an implementation of the Relational Algebra: It doesn't support SQL, so it's not like Oracle, PostgreSQL, Sybase or MySQL. The relational algebra is an important underpinning to SQL, and students will find that LEAP helps them better understand this vital component of relational theory.
  • LocalSQL
    LocalSQL provides a library and command line tool for direct invocation and processing of SQL statements on local databases (data is stored in dbase files). A subset of SQL92 is implemented.
  • MariaDB
    MariaDB is a database server that offers drop-in replacement functionality for MySQL. MariaDB is built by some of the original authors of MySQL, with assistance from the broader community of Free and open source software developers.
    MDBMS is a relational DBMS which features an ingres-like interface and comes with a C library and a CGI-bin for dynamic HTML pages. The database server consists of 1 daemon and no configuration.
  • Mimer SQL
    Mimer SQL provides small footprint, scalable and robust relational database solutions that conform to international ISO SQL standards. It is very well suited for high performance mission critical systems as well as for mobile and embedded solutions. Mimer SQL supports the ODBC, JDBC, ESQL, Mono, ADO and ADO.NET database APIs and runs on all major operating systems including Windows, UNIX, Linux, Mac OS X, Symbian OS, PocketPC and OpenVMS.
  • Mroonga
    Mroonga is a MySQL storage engine based on groonga, the full text search engine. It uses the Pluggable Storage Engine interface in MySQL 5.1 and later.
  • mSQL (Mini SQL)
    Mini SQL (mSQL) is a light weight relational database management system capable of providing rapid access to your data with very little overhead.
  • MySQL/Galera
    MySQL/Galera is a MySQL distribution that can be used to create a synchronous multi-master MySQL cluster.
  • NoSQL
    NoSQL is a fast, portable, relational database management system without arbitrary limits, (other than memory and processor speed) that runs under, and interacts with, Linux. It uses the OperatorStreamParadigm described in "Unix Review", March, 1991, page 24, entitled "A 4GL Language".
  • OpenEdge RDBMS
    (commercial) OpenEdge RDBMS is an open, flexible, scalable, and highly available database solution that supports virtually unlimited numbers of users and transactions with minimal administration and maintenance.
  • Pervasive.SQL
    (commercial) Pervasive.SQL on Linux is a low-maintenance, scalable database management system specifically designed to meet the fast changing needs of the Internet age. Pervasive.SQL provides remote client data requesters as well as a full featured, high performance back end server engine.
  • picoSQL
    An Italian RDBMS. Because it derives from a commercial project, it is already robust, fast, and rather complete.
  • PrimeBase
    (commercial) A relational DBMS (Database Management System) for Mac, Mac OS X, UNIX and Windows 95/98/NT platforms. PrimeBase supports all common database access standards (SQL, ODBC, JDBC, DAL and EOF Adaptor) and protocols (including TCP/IP and ADSP).
  • PyBackend
    PyBackend is a relational database backed object development framework written in python and released under GNU Library General Public License. It allows object persistence through a relational database backend. You need not write SQL queries within your class to store or retrieve object-attributes.
  • PySQLite
    PySQLite is a powerful embedded relational database engine. PySQLite makes it available to Python developers via the Database API 2.0.
  • QDDB
    A database suite that includes a a powerful Tcl/Tk graphical user interface library, an Fx-based program for managing database information, a report generator and more.
  • Rasql
    Rasql implements a subset of SQL and was coded in Lua to experiment with the relational and column-wise storage model of Metakit. It was heavily influenced by Gordon McMillan's MkSQL work.
  • Recital
    (commercial) Recital is a family of products that includes a new and enhanced version of; Recital 9 Terminal Developer, an IDE for building and deploying internet-based applications; Recital 9 Visual Developer, and a cross-platform ANSI SQL compliant database server that is also compatible with Visual FoxPro 8.0 SQL; The Recital 9 Database Server.
  • Red Brick Decision Server
    (commercial) A powerful Informix database engine for data warehousing in Web or conventional decision-support environments.
  • Schevo
    Schevo is a next-generation DBMS that focuses on database integrity, rapid development, user interface generation, rich schema definition, and assisted schema evolution. Schevo was designed to address shortcomings in SQL-based relational databases where they do not match well with object-oriented programming languages. Schevo solves this problem by combining relational features with the object-oriented programming language Python. Schevo includes a GUI Navigator that can display a fully interactive interface into any Schevo database, using the metadata available within a Schevo database file.
  • SHORE Project
    The objective of the Shore project is to design, implement, and evaluate a persistent object system that will serve the needs of a wide variety of target applications including hardware and software CAD systems, persistent programming languages, geographic information systems, satellite data repositories, and multi-media applications.
  • shsql
    shsql is a standalone SQL database that stores data in ascii text files. It has a small memory footprint and code size and can be embedded directly into applications-- there is no server process. SHSQL is a pared-down SQL implementation but retains useful features such as timeout record locking and search engine comparison operators.
  • SkipDB
    A BerkeleyDB style database implemented with skip lists instead of a b-tree.

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