SeeQL

软件

See your database in a new way. SeeQL is an easy-to-use desktop application that helps you visualize your database tables (including all foreign and primary key relationships), to quickly generate complex queries.

DbDesigner.net

软件

DbDesigner is a web application which allows you to design your database schema without writing SQL.

PgPad

数据库管理工具

A fully free and open-source (no “community edition”, premium plans, etc.) database manager.

SQLEditor

数据库管理工具

A Database design and entity relationship diagram (ERD) tool for Mac OS X. SQLEditor replaces typing SQL by hand with dragging, dropping and clicking. It makes creating databases much faster and really helps reduce errors. If you already have a database then SQLEditor can help.