The Free Database Compare application will allow you to compare the structure of two databases and display all the differences between them.

Supported databases include: SQL Server (All Editions), MySQL and Access databases.

You can compare two different databases, like access and SQL 2000.

It will also allow you to create snapshots of a database and compare a live database to a snapshot.

A database structure viewer is included.

You can filter the comparison results by type of object and you can also choose to exclude the comparison of constraints and fields.