PostgreSQL

About.com on Postgres
Provides feature articles, net links, forum discussions and a chat room.
http://databases.about.com/od/postgresingres/Postgres_and_Ingres_Databases.htm

Databases: As The Tables Turn
Tim Perdue article about porting sourceforge code from MySQL to PostreSQL.
http://www.phpbuilder.com/columns/tim20001112.php3

dbengine
A plug 'n play Web interface for PostgreSQL and Oracle.
http://www.cis-computer.com/software/dbengine/

DreamCoder
GUI development environment that includes a debugger and a code generator. By Mentat Technologies. [Commercial]
http://www.mentattech.com/themes/mentat/dreamcoder/postgresql/index.html

Embedding R in Postgres
The REmbeddedPostgres package allows you to embed the R interpreter in Postgres and use R functions as if they were built-in SQL functions.
http://www.omegahat.org/RSPostgres/

EnterpriseDB
A relational database management system based on PostgreSQL. It adds compatibility and performance features.
http://www.enterprisedb.com/

Guide to Version 7.x Development and Configuration
A side by side comparison to Oracle 8i that can also be read as a stand alone document.
http://www.osmosislatina.com/postgres/index.htm

Interactive SQL
GUI tool for creating SQL queries and managing PostgreSQL databases [commercial].
http://www.microolap.com/products/database/pgisql/

MySQL PHP to PostgresSQL
A program that takes a php page that uses mysql calls and changes them into Postgres calls.
http://mp2p.mikekohn.net/

Native PostgreSQL Frontend for Windows
Client applications for Windows including native SQL terminal and backup tools, psql and pg_dump, for executing SQL scripts and accessing PostgreSQL servers remotely.
http://psql.sourceforge.net/

Navicat
This client tool enables users to manage multiple databases on local or remote servers easily. This is available for Windows and Mac OS X. (Important: this is not the tool from www.navicat.com)
http://pgsql.navicat.com

2ndQuadrant
Training and support for development, tuning, and replication. Site includes course outlines, pricing, and schedules.
http://www.2ndQuadrant.com

NuSphere UltraSQL
NuSphere UltraSQL is a native Windows port of popular PostgreSQL database. [Commercial]
http://www.nusphere.com/products/ultrasql.htm

OCaml
OCaml bindings that allow access to Postgres from the OCaml programming language. [Open Source, LGPL]
http://alain.frisch.fr/soft#xpath

Octave-pg
Octave modules to access PostgreSQL.
http://dirk.eddelbuettel.com/code/octave-pg.html

Oracle v. Postgres
Forum discussion comparing Oracle and Postgres.
http://openacs.org/forums/message-view?message_id=17231

Performance Tuning PostgreSQL
This article aims to help demystify PostgreSQL database performance tuning.
http://www.revsys.com/writings/postgresql-performance.html

PGAda
Provides a download of a module for Ada enabling access to the database system.
http://www.rfc1149.net/devel/pgada.html

PGCup
PGCup is a simple Java PostgreSQL administration tool. Currently under development and seeking volunteers. [Berkeley/BSD].
http://gborg.postgresql.org/project/pgcup/projdisplay.php

PGExplorer
A GUI development tool for the Postgres Database Server is persented with screenshot, FAQ, download and costs. [Commercial].
http://www.pgexplorer.com/

PhpPgAdmin
Feature list and downloads for a web-based administration tool.[Open Source, GPL]
http://phppgadmin.sourceforge.net/

PL-J
A stored procedure platform that provides Java and other object oriented language integration.
http://plj.codehaus.org/

PostGIS: Geographic objects for PostgreSQL
Spatially enables the server, allowing it to be used as a backend spatial database for geographic information systems (GIS).
http://postgis.refractions.net/

Postgres on Redhat7.0
Article from PHPBuilder on obtaining packages, installing and configuring.
http://www.phpbuilder.com/columns/kevin20010314.php3

PostgresDAC
Borland Delphi/C++Builder component set for direct access to PostgreSQL without BDE or ODBC.
http://www.microolap.com/products/connectivity/postgresdac/

PostgresPy Project
An open source software project dedicated to the continual improvement of the relationship between Python and PostgreSQL.
http://python.projects.postgresql.org

PostgreSQL Autodoc
Automated creation of PostgreSQL documentation in Dia, Docbook, HTML, and GraphViz formats.
http://www.rbt.ca/autodoc/

PostgreSQL Forums
Forums for developers, administrators, and users of the PostgreSQL database.
http://www.postgresqlforums.com/

PostgreSQL Inc.
Commercial support for the object-relational database management system, PostgreSQL, as well as full database hosting.
http://www.pgsql.com/

Postgresql Korean Users' Group
Official Homepage of PostgreSQL Korean Users' Group. This site contain documents, patches, user's profiles of PostgreSQL korean users.
http://www.postgresql.or.kr

PostgreSQL Manager
Graphical tool for PostgreSQL administration and development.
http://www.pgsqlmanager.com/

PostgreSQL Module for Python
Python module that embeds the PostgreSQL query library.
http://www.druid.net/pygresql/

PostgreSQL Technical Documentation
Contains community contributed documentation, CBT (Computer Based Training) tutorials, installation guides, technical guides, support contracts, lists of hosting providers, and additional resources.
http://www.postgresql.org/docs/techdocs

PsqlODBC
ODBC driver for Windows. Download, mailing list, documentation, and FAQs.
http://pgfoundry.org/projects/psqlodbc/

pyPgSQL
A Python library for accessing PostgreSQL databases that conforms to the Python DB-API version 2.
http://pypgsql.sourceforge.net/

Recursive functions in PostGreSQL PGSQL
An example of how to display a recursive tree in pgsql.
http://www.paragoncorporation.com/ArticleDetail.aspx?ArticleID=24

Red Hat Database
A version of Postgres that has been optimized for the Red Hat Linux distribution.
http://sources.redhat.com/rhdb/

A Review by Paragon Corporation
Article that focuses on features that make PostgreSQL different from most relational database management systems.
http://www.paragoncorporation.com/ArticleDetail.aspx?ArticleID=11

Search PostgreSQL Sites
A searchengine for PostgreSQL-Documentation. Sample application for Tsearch2.
http://www.pgsql.ru/

Tsearch2
Implementation of a new data type tsvector - a searchable data type with indexed access. Documentation and download.
http://www.sai.msu.su/~megera/postgres/gist/tsearch/V2/

XPg: PostgreSQL GUI on Java
XPg is an object-oriented platform-neutral editor with a full featured graphical user interface that supports connections to multiple databases [Open Source : GPL].
http://www.kazak.ws/xpg