ER/One : A free Data Modeler Tool
ER/One Data Modeler allows developers to graphically design databases by using physical models and entity relationship diagrams to automatically generate the most popular SQL databases. It also allows developers to easier deploy the databases by offering a sophisticated visual data modeling environment. The software reduces errors in databases development while improves productivity and simplifies data modeling. Developers can visualize physical models structures to understand their databases, create new databases or reverse-engineer existing databases to modify, analyze, and optimize the solution. It is extremely easy to use and understand. Dedicated for both beginners and experts in database modeling, it is simple to get familiar with. ER/One provides all the features you expect of a professional database modeling and design tool. Read more.
The supported databases: