phpPgAdmin is phpMyAdmin (for MySQL) ported to PostgreSQL. phpPgAdmin is a
fully functional PostgreSQL administration utility. You can use it to create
and maintain multiple databases and even multiple servers. 

Features include: 
 - create and drop databases 
 - create, copy, drop and alter
   tables/views/sequences/functions/indicies/triggers 
 - edit and add fields (to the extent Postgres allows) 
 - execute any SQL-statement, even batch-queries 
 - manage primary and unique keys 
 - create and read dumps of tables 
 - administer one single database 
 - administer multiple servers 
 - administer postgres users and groups 

WWW: http://phppgadmin.sourceforge.net/