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SchemaSpy analyzes database metadata to reverse engineer dynamic Entity Relationship (ER) diagrams. It works with just about any JDBC-compliant database (Oracle/MySQL/DB2/SQL Server/PostgreSQL/Sybase/etc.) and can identify Ruby on Rails as well as other implied relationships.
Reportico PHP Reporting Tool. Runs against MySQL, PostgreSQL, Informix, Oracle, SQLServer and SQLite - design reports, create report menus, configure criteria, graphs, grouping, drill-down, output in HTML, PDF, & CSV, expression handling, look and feel through CSS, data transformation.