Database diagram / Reverse Engineering tools
List of database ER diagram (ERD) / schema visualization / reverse engineering tools for popular databases.
Jeddict is an open source development platform that simplifies development tasks of creating complex entity relationship models. It provides forward & reverse engineering capabilities, import models from existing database, generate complex SQL/DDL, and much more. Make it available again by importing the existing database and create new ER diagram.
Mogwai ERDesigner is an open source entity relationship modeling/design tool. It generates true 3D anaglyphic views from your database structure and has an integrated reverse engineering module for existing schemas.
Astah's modeling tools allow you to quickly and effortlessly build diagrams that create a clear understanding among teams. By installing the reverse engineering plug-in, you can import an existing database into a visual ER diagram.
SQL Power Architect data modeling tool has many unique features geared specifically for the data warehouse architect. It allows users to reverse-engineer existing databases, perform data profiling on source databases and auto-generate ETL metadata.