pgAdmin

pgAdmin is the most popular and feature-rich open-source administration and development platform for PostgreSQL, the world's most advanced open-source relational database. It has evolved from a desktop application to a sophisticated web-based interface (pgAdmin 4), accessible from any modern browser. This architecture facilitates remote management and easier deployment in server environments. pgAdmin provides deep, granular control over all aspects of a PostgreSQL server, from routine tasks like writing queries and managing tables to advanced operations like configuring replication, managing extensions, and tuning server parameters.

Its query tool includes a graphical explain plan analyzer that is invaluable for performance tuning. The dashboard offers real-time monitoring of server status, locks, and activity. As a project governed by the PostgreSQL Global Development Group, it maintains perfect fidelity with PostgreSQL's feature set. It is the go-to tool for PostgreSQL DBAs and developers who need an authoritative, comprehensive, and free management interface.

While its web-based UI can feel less responsive than a native desktop app for some actions, its functionality and depth for PostgreSQL are essentially unrivaled.