DBeaver - DBeaver - Universal Database Manager and SQL Client.
SQLTools++ - Home of SQLTools++
SQL Developer - Oracle SQL Developer is a free, development environment that simplifies the management of Oracle Database in both traditional and Cloud deployments.
TOra - tora - TOra is an open source SQL IDE for Oracle, MySQL and PostgreSQL dbs.
PL/SQL Developer - PL/SQL Developer is an Integrated Development Environment that is specifically targeted at the...
SQuirreL SQL - SQuirreL SQL is an open-source Java SQL Client program for any JDBC compliant database