Open Source & Freeware DBMS

• ACM SIGMOD Index of Publicly Available Database Software
  Listagem mantida pelo ACM SIGMOD - Special Interest Group on Management of Data (SIGMOD) da ACM.
• Free Database List
• The Sourceforge.net Database Foundry
  Open Source Databases.

MySQL

• MySQL
  By MySQL AB.
  Notícias, Informação, Documentação, Suporte, Downloads, Desenvolvimento. MySQL é um sistema de gerenciamento de bancos de dados (SGBD) relacional gratuito, robusto e rápido, sendo o mais popular servidor SQL em Linux. É Open Source desde Junho/2000, sob GPL (GNU General Public Licence).
• MySQL Developer Zone
  
  • MySQL Download
  • MySQL Reference Manual
• MySQL Partner Solutions
  
  • MySQL Software Partners
• DeepX Quick References: MySQL 4.02-alpha (PDF)
  By deepX - Data Engineering and Electronic Publishing with XML Technologies.
  DeepX Quick References.
• MySQL Open Source Development Project Center at SourceForge.net.
• NuSphere MySQL
  By NuSphere - A Progress Software Company.
  NuSphere MySQL oferece distribuições melhoradas de MySQL, open source e comerciais, para sites e aplicações adotando MySQL.
• MySQL-Front
  Front-end for Administration of MySQL Hosts. Freeware for Win32.
• DBTools
  Free Data Management for Windows. This first version has only support to manage MySQL Databases, but support for others servers will be implemented in the future, specially to PostgreSQL.
• phpMyAdmin
  phpMyAdmin is a complete web administration tool for MySQL, written in PHP and free. Its interface is available in many languagens. SourceForge.net Project.
  phpMyAdmin Live Demo.
• MySQLTool
  MysqlTool provides a web interface to manage MySQL server installations. Entirely written in Perl using DBI, MysqlTool runs better with Apache and mod_perl, but should work as well as CGI in any platform supporting Perl. MysqlTool is open source (GPL).
  MysqlTool live Demo.
• MySQL Contributed Documentation
  Documentation, Articles, Discussion Groups, Links, Books.
• Nou-Rau: MySQL Database [In Portuguese]
  Document repository on MySQL database, at Nou-Rau Free Software Unicamp, on-line service for document archive and retriving.
• Centralized syslog-ng to Mysql
  Article by Michael Earls.

Comparisions with other SQL Servers

• MySQL Crash-Me Database Comparision Table
  SQL Database Servers: MySQL, Access, Adabas, IBM DB2, Empress, FrontBase, Informix, Microsoft SQL Server, Mimer, mSQL, Oracle, PostgreSQL, Solid, Sybase Enterprise.
  Testes: Crash-Me security test. Suporte a tipos e funções ANSI SQL 92, ODBC 3.0 e outros. Funções em WHERE, Group functions ANSI SQL 92 e Outros, Order By e Group By, Métodos de Join, Tratamento de Strings. Limites de Nomes, Índices, Tipos e Expressões. Suporte a Cometários. Outros recursos e limites.
• MySQL and PostgreSQL Compared
  Artigo por Tim Perdue, PHPBuilder.com.
• MySQL Manual: How MySQL Compares to PostgreSQL
• Why Not MySQL
  Artigo por Ben Adida, Maio 2000.

Programming Interfaces (API) and Drivers for MySQL

• MySQL Manual - MySQL APIs
• Connectors - MySQL Drivers
  Connector/ODBC: standardized ODBC database driver for Windows, Linux, Mac OS X, and Unix platforms. Connector/J: standardized JDBC database driver for Java platforms and development.
• MySQL++
  MySQL++ is a C++ API for MySQL.
• Perl/DBI modules for MySQL
  DBI is the basic abstraction layer for working with databases in the Perl programming language. DBD::mysql is the driver for connecting to MySQL database servers through DBI. Net::MySQL is a pure-Perl implementation of the MySQL client-server protocol.
  MySQL Perl modules at CPAN.

PostgreSQL

• PostgreSQL
  PostgreSQL é um sofisticado DBMS Objeto-Relacional OpenSource.
  PostgreSQL Competition - Feature comparision chart.
  Frequently Asked Questions (FAQ) for PostgreSQL.
• PostgreSQL Support Mailing Lists: The Archives
  Search PostgreSQL lists archives.
  PostgreSQL Mailing List Archive at FAQchest.
• dbExperts PostgreSQL Professional
• Nou-Rau: PostgreSQL Database [In Portuguese]
  Document repository on PostgreSQL database, at Nou-Rau Free Software Unicamp, on-line service for document archive and retriving.
• Google Groups: comp . databases . postgresql
• PostgreSQL Drivers
  
  • PostgreSQL JDBC Drivers
  • PostgreSQL ADO Drivers - psqlODBC
• pgAdmin III
  pgAdmin III is a comprehensive administration interface for the PostgreSQL database. The application is running under GNU/Linux, FreeBSD and MS Windows. It is designed to answer the needs of all users, from writing simple SQL queries to developing complex databases, with support of the latest PostgreSQL features. The software is released with an installer and does not require any additional driver to communicate with the database server. pgAdmin is developed by a community of database specialists around the world and is available in more than 30 languages. It is Free Software released under the Artistic License.

Other Open-Source & Freeware SQL Servers

• Firebird
  "Relational Database for the New Millennium". Firebird is a relational database offering many ANSI SQL-92 features that runs on Linux, Windows, and a variety of Unix platforms. Firebird offers good 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. Firebird is an open-source independent project, based on the InterBase Public License source code released by Inprise/Borland on July 2000, and it is highly compatible with Borland InterBase.
• HSQL Database Engine (hsqldb)
  hsqldb: Lightweight 100% Java Database Engine. hsqldb Project at SourceForge is a continuation of Thomas Mueller's closed Hypersonic SQL (HSQL) Project. HSQLDB is a relational database engine written in Java, with a JDBC driver, supporting a rich subset of ANSI-92 SQL. It offers a small (about 100k), fast database engine which offers both in memory and disk based tables. HQLDB is Open Source and free to use in any product, commercial or not, so long as the terms of the Licenses are met. The HSQLDB Licence is based on the BSD License, and the license for HypersonicSQL (on which HSQLDB is based) is very similar to the Apache License.
  SourceForge Project: hsqldb.
• Berkeley DB
  Sleepycat Software builds, distributes, and supports The Berkeley Database (Berkeley DB), Open Source embedded database system. Berkeley DB is a widely-used and well known application-specific data management software. It's fast, scalable and reliable.
• Apache Derby (open source) & IBM Cloudscape (commercial)
  The Derby project develops open source relational database technology that is: Pure Java, easy to use, small footprint, standards based (ANSI SQL, JDBC), Secure. Java platforms such as OSGi, J2ME, J2SE and J2EE are supported as appropriate. Derby/Cloudscape is fully transactional and it's a purely embedded database that can either be used within an application, or as the database for a more traditional client-server application. There's no need for a database administrator; you just write the application with database calls.
  Why IBM is open sourcing Cloudscape as Derby, by Jon Prial, IBM Vice President, October 2004. Future commercial versions of IBM Cloudscape will be based on the Derby code base.
• Mini SQL - mSQL by Hughes Technologies