DBeaver - DBeaver - Universal Database Manager and SQL Client.
Database Browser - Database browser is an universal table editor.
FlameRobin - FlameRobin is a cross-platform, open-source database administration tool for Firebird DBMS.
SQuirreL SQL - SQuirreL SQL is an open-source Java SQL Client program for any JDBC compliant database
RazorSQL - RazorSQL is an SQL Editor and SQL database query tool for macOS, Windows, Linux, and Mac OS X.
Navicat - Powerful database management & design tool for Win, Mac & Linux. With intuitive GUI, user manages MySQL, MariaDB, SQL Server, SQLite, Oracle & PostgreSQL DB easily.