check_postgres.pl is a script for checking the state of one or more Postgres databases and reporting back in a Nagios-friendly manner. It was developed by Greg Sabino Mullane of End Point Corporation and is BSD-licensed. The latest version is 1.6.0, and was released on May 2, 2008.
The latest development version can be downloaded via git:
git-clone http://bucardo.org/check_postgres.git