Toad Data Modeler is a program developed by Quest Software. Quest has been dedicated to making database management easier for DBAs and developers.
With Toad Data Modeler, Quest created a tool that allows easy design, modeling and administration of data.
Every experienced database administrator knows that a good, thorough design of a database has plenty of benefits, such as an execution speed, scalability and stability.
With TDM you can visually create the tables and their elements in a quick way. After that, the entity relationships models can be created in the same way. Model synchronization and database scripting are also included in the program main features.
It should be noted, that you can do reverse engineering modeling that allows DBAs to model previous databases without having to design it again from scratch.
At $479, the tool has a nice price tag, compared to similar products, although it is not the cheapest out there, but definitely competitive.
The manual in the actual package is not very good, however, the Toad community has plenty of tutorials on the Internet for beginners to get to grips with the program. Every DBA must consider this program in their tool list.