Beekeeper Studio - Open source SQL editor and database manager
PostgreSQL Maestro - PostgreSQL Maestro allows you to create, edit, copy, drop and dump all Postgres database objects.
Postgres.app - The easiest way to run PostgreSQL on the Mac.
DBeaver - DBeaver - Universal Database Manager and SQL Client.
dbForge Data Compare for PostgreSQL - dbForge Data Compare for PostgreSQL is a visual data diffs comparison and deployment tool for PostgreSQL.
HeidiSQL - HeidiSQL is a powerful and easy client for MySQL, MariaDB, Microsoft SQL Server and PostgreSQL. Open source and entirely free to use.