Open Source Database Management Systems
Firebird, HyperSQL, PostgreSQL, MySQL, SimpleDBM, SQLite, MonetDB

Database Magazines, Articles, Howto and Tips
DevMedia, VLDB

CASE Tools for Database Modeling
DBDesigner, MYSQL Workbench

Database Benchmarks
DBT-1, DBT-2, DBT-3, DBT-4, DBT-5, OSDB

Schema Mapping Benchmarks
STBenchmark

Sample Database Schemas
XML(xsd), Conceptual

Schema Search Engine
Schemr

Graphical Database Schema Metadata Browser
SchemaSpy

WIKIs
WikiCFP

Others
SlideShare

UFCG
Programas PIBIC/PIVIC