DBeaver - DBeaver - Universal Database Manager and SQL Client.
dbForge SQL Complete - Try Intellisense functionality and Improved SQL Formatter in SQL Server Management Studio and Visual Studio using SQL Complete!
Firebird Maestro - SQL Maestro Group vendors powerful database management and web development tools for MySQL, Oracle, SQL Server, DB2, SQL Anywhere, PostgreSQL, SQLite, Firebird and MaxDB.
Dataedo - Database documentation tool
FlameRobin - FlameRobin is a cross-platform, open-source database administration tool for Firebird DBMS.
DbGate - Open Source Database Manager for SQL Server, MySQL, PostgreSQL, SQLite, MongoDB, Redis and more