DBeaver - DBeaver - Universal Database Manager and SQL Client.
pgAdmin - pgAdmin Website
Postbird - Simple to use PostgreSQL GUI client
Postico - A modern PostgreSQL client for OS X
MySQL Workbench - MySQL Workbench is a unified visual tool for database architects, developers, and DBAs.
pgModeler - Open source data modeling tool designed for PostgreSQL. No more DDL commands written by hand. Let pgModeler do the job for you!