SQL Developer - Oracle SQL Developer is a free, development environment that simplifies the management of Oracle Database in both traditional and Cloud deployments.
DBeaver - DBeaver - Universal Database Manager and SQL Client.
DataGrip - Tool for SQL and databases
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.
FlameRobin - FlameRobin is a cross-platform, open-source database administration tool for Firebird DBMS.
dbForge Studio for Oracle - dbForge Studio for Oracle is a powerful IDE used by Oracle SQL developers to development, administration, management, and synchronization of Oracle databases via a handy GUI.