DBeaver - DBeaver - Universal Database Manager and SQL Client.
Open DBDiff - A database comparison tool for Microsoft SQL Server 2005+ that reports schema differences and...
DataGrip - Tool for SQL and databases
Redgate SQL Data Compare - Use Redgate SQL Data Compare to compare and synchronize static, lookup, and reference data in your SQL Server database - try it free
MySQL Workbench - MySQL Workbench is a unified visual tool for database architects, developers, and DBAs.
a7 SqlTools - Tools for MS Sql management with search, explore and comparison functionality.