One of the leading Open Source database engines available today. With features more competitive to the top tier commercial vendors than other Open Source alternatives, the platform offers a wide range of features and abilities. Adding to that value is a more Mac friendly packaging that eschews the need to be a developer or experienced Unix system administrator to set up.
Run the installer, start and stop the server from System Preferences and use graphical tools to create users, databases and run queries. For automation purposes, there are Automator actions included in the package, along with JDBC libraries, and a ready to use framework that enables Cocoa developers to quickly access and consume PostgreSQL data.