DBeaver - DBeaver - Universal Database Manager and SQL Client.
Open DBDiff - A database comparison tool for Microsoft SQL Server 2005+ that reports schema differences and...
SQuirreL SQL - SQuirreL SQL is an open-source Java SQL Client program for any JDBC compliant database
DataWeigher - The DataWeigher is the tool to compare and synchronize data.
DBComparer - Free Compare database tool - DBComparer 3.0 is a professional compare database tool for comparing Microsoft SQL Server 2008 (and 2005) database structure.
Replicator - Easily replicate database table data - even with heterogeneous databases.