Database Designer for PostgreSQL!

MySQL Workbench is a unified visual tool for database architects, developers, and DBAs. MySQL Workbench provides data modeling, SQL development, and comprehensive administration tools for server configuration, user administration, and much more. MySQL Workbench is available on Windows, Linux and Mac OS.

DBeaver - Universal Database Manager and SQL Client. DBeaver is free and open source (GPL) universal database tool for developers and database administrators.

HeidiSQL is a useful tool designed for web developers using the popular MySQL server, Microsoft SQL databases and PostgreSQL. It enables you to browse and edit data, create and edit tables, views, procedures, triggers and scheduled events. Also, you can export structure and data either to SQL file, clipboard or to other servers.

SQuirreL SQL is an open-source Java SQL Client program that will allow you to view the structure of a JDBC compliant database, browse the data in tables, issue SQL commands etc.

DbVisualizer is the universal database tool for developers, DBAs and analysts. It is the perfect solution since the same tool can be used on all major operating systems accessing a wide range of databases.

DbSchema - ER Diagram & SQL Database Tool

RazorSQL is an SQL query tool, database browser, SQL editor, and database administration tool for Windows, Mac OS X, Linux, and Solaris.

SQL Workbench/J is a free, DBMS-independent, cross-platform SQL query tool. It is written in Java and thus it should run on any operating system that provides a Java Runtime Environment.

Simple to use PostgreSQL GUI client

SAP PowerDesigner: Enterprise Architecture tools for digital transformation successPlan and manage complex business transformation initiatives with SAP PowerDesigner. The software’s data modeling tools let you build a blueprint of your current enterprise architecture and visualize the impact of change before it happens. Automatically capture architecture layers and requirements, tap into a powerful metadata repository, and share discoveries with your team.

Free visual data modeling inspection tool for most popular one-way reverse-engineered relational databases. With a generic graphical interface, and auto-generated detailed, structural, relationships, simple, graph or topological models. Expanded, collapsed, minimized or transparent shapes. Chain relationships, custom joins and aliases, to enhance your model without altering the database itself.

SQL Maestro for MySQL is the premier MySQL admin tool for MySQL database management, control and development. Key features include:

ER/Studio is the an industry-leading data modeling tool helping companies discover, document, and re-use data assets.