DBConvert for Oracle & PostgreSQL - Migrate Oracle database to PostgreSQL server or backwards.
DBeaver - DBeaver - Universal Database Manager and SQL Client.
KS DB Merge Tools - Database diff and merge tools
DataGrip - Tool for SQL and databases
Devart Studio for SQL Server - dbForge Studio for SQL Server is a powerful SQL Server GUI Tool for SQL Server database management, administration, development, datareporting and analysis.
MySQL Workbench - MySQL Workbench is a unified visual tool for database architects, developers, and DBAs.