Toad™ Data Modeler is a cost-effective, yet powerful data modeling and design tool that is built for the individual developer, DBA and data architect.  With Toad Data Modeler you can: Visually create complex logical & physical entity-relationship diagrams (ERD) Create ERD for many database systems Reverse engineer legacy databases into ER diagrams Add logical data to ER diagrams and describe database structures better Verify ERD (model) and generate a list of Errors/Warnings/Hints Automatically generate SQL code for selected target database Generate detailed documentation in HTML or RTF format Synchronize models with existing database Track changes using internal Version Manager Create and maintain a list of tasks related to your model Manage objects in ERD via internal scripting (e.g., user-defined batch rename scripts) Customize to meet your requirements