Bancos de dados gratuitos

 

SQL Server 2005 Express Edition Features

 http://www.microsoft.com/sql/editions/express/features.mspx

Oracle Database 10g Express Edition

http://www.oracle.com/technology/products/database/xe/index.html 

DB2 Express-C

http://www-306.ibm.com/software/data/db2/express/getstarted.html