DBeaver - DBeaver - Universal Database Manager and SQL Client.
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.
DataGrip - Tool for SQL and databases
FlameRobin - FlameRobin is a cross-platform, open-source database administration tool for Firebird DBMS.
DbVisualizer - DbVisualizer is the universal database tool for developers, DBAs and analysts.
DbGate - Open Source Database Manager for SQL Server, MySQL, PostgreSQL, SQLite, MongoDB, Redis and more