DBD::PgPP is a Pure Perl client interface for the PostgreSQL database. This module implements network protocol between server and client of PostgreSQL, thus you don't need external PostgreSQL client library like "libpq" for this module to work.
It means this module enables you to connect to PostgreSQL server from some operation systems which PostgreSQL is not ported. How nifty!
This project is working in SourceForge.net.
Package and Source-code, and Document should look at CPAN.