PostgreSQL Maestro is described as 'allows you to create, edit, copy, drop and dump all Postgres database objects. It is a PostgreSQL GUI admin tool working as a Postgres client for Windows' and is a Database Manager in the Development category. There are more than 25 alternatives to PostgreSQL Maestro for a variety of platforms, including Windows, Mac, Linux, Self-Hosted solutions and PHP. The best alternative is DBeaver, which is both free and Open Source. Other great apps like PostgreSQL Maestro are phpMyAdmin (Free, Open Source), pgAdmin (Free, Open Source), Adminer (Free, Open Source) and Valentina Studio (Freemium).
DBeaver - Universal Database Manager and SQL Client. DBeaver is free and open source (GPL) universal database tool for developers and database administrators. Usability is the main goal of this project, program UI is carefully designed and implemented.
phpMyAdmin is a tool written in PHP intended to handle the administration of MySQL over the Web. Currently it can create and drop databases, create/drop/alter tables, delete/edit/add fields, execute any SQL statement, manage keys on fields.
Adminer (formerly phpMinAdmin) is a full-featured database management tool written in PHP. Conversely to phpMyAdmin, it consist of a single file ready to deploy to the target server. Adminer is available for MySQL, PostgreSQL, SQLite, MS SQL and Oracle
TablePlus is a native app which helps you easily edit database data and structure. TablePlus includes many security features to protect your database, including native libssh and TLS to encrypt your connection.
Database .NET is an innovative, powerful and intuitive multiple database management tool. With it you can Browse objects, Design tables, Edit rows, Export data and run Queries with a consistent interface. A standalone tool that does not require installation.
Free & Open Source SQL editor and database manager. Works with MySQL, Postgres, SQLite, SQL Server, Maria DB, CockroachDB, RedShift and more. Available for Windows, Mac, and Linux. Great features: - Clean, tabbed interface for SQL editing.