Freeware - MySchema is a very lightweight windows program that lets you design MySQL databases, and share entity ralationship diagrams with you developers. MySQL does not support foreign keys, and this makes it hard to understand the relationships in a MySQL database. MySchema allows you to draw links between tables in your database. This can save you alot of time and possible lost data.
SILVERRUN ModelSphere - Java Designer Kit (Linux)
UML Class Modeling. Java Design, Reverse / Forward engineering.
SQLDBCompare
The powerful database schema comparison and synchronization tool for SQL Server database. It compares either an individual object or the entire database objects within two databases, and also synchronizes the database objects within two databases.
SILVERRUN ModelSphere - Java Designer Kit
UML Class Modeling. Java Design, Reverse / Forward engineering.
Database Design Studio - Lite (DDS-Lite)
DDS-Lite - is a powerful tool to create Enhanced Entity Relationship Diagram, Data Structure Diagram, Data Definition Language (DDL) Scripts, Supports All Major Databases, Cross DBMS Target Compatibility, Project Manager, Tools and Java Source Code.
insertXpress
Smart INSERT scripts for moving data between tables in different databases! Transfers all data types, including IMAGE, BINARY and VARBINARY, from tables or views. Appends, replaces or updates data. Uses IntelliSense® in WHERE statements.