pgAdmin - pgAdmin Website
DBeaver - DBeaver - Universal Database Manager and SQL Client.
DataGrip - Tool for SQL and databases
Adminer - Adminer (formerly phpMinAdmin) is a full-featured database management tool written in PHP.
HeidiSQL - HeidiSQL is a powerful and easy client for MySQL, MariaDB, Microsoft SQL Server and PostgreSQL. Open source and entirely free to use.
pgweb - Web-based PostgreSQL database browser written in Go. Pgweb is a web-based database browser for PostgreSQL, written in Go and works on OSX, Linux and Windows machines.