Database Servers
Apache Derby / Sun's Java DB (recommended)
- Apache Derby: Site for Apache Derby.
- Embedded Derby: Information on using Derby as an embedded database.
- Developing with Apache Derby: Hitting the Trifecta
- Java DB: Site for Sun's Java DB.
Microsoft SQL Server
- SQL Server™ 2005 Express Edition: GUI tool for managing SQL Server 2005.
- SQL Server Database Performance Tuning: Reference for SQL Server sponsored by Idera™.
- SQL Server Tips: Your daily source for SQL Server tips.
- SQLTeam.com: Site for Microsoft SQL Server users to share information and build a community.
MySQL
- MySQL™: Official site for MySQL.
- MySQL GUI Tools: Includes MySQL Administrator, MySQL Query Browser and MySQL Migration Toolkit
PostgreSQL (recommended)
- Getting Started With PostGIS: An almost Idiot's Guide: An excellent tutorial for using PostGIS with PostgreSQL.
- PostGIS: PostGIS is an add-on that spatially enables PostgreSQL.
- PostgreSQL: Official site for PostgreSQL.
Database Normalization: A wikipedia explanation.
Database Normalization Basics: A pratical, concise article on database normalization.
Oracle FAQ: Information on Oracle.
SQL.ORG: Resource for gleaning all kinds of information on Structured Query Language (SQL).