The PostgreSQL port has a collection of "side orders":
postgresql-doc
For all of the html documentation
p5-Pg
A perl5 API for client access to PostgreSQL databases.
postgresql-tcltk
If you want tcl/tk client support.
postgresql-jdbc
For Java JDBC support.
postgresql-odbc
For client access from unix applications using ODBC as access
method. Not needed to access unix PostgreSQL servers from Win32
using ODBC. See below.
ruby-postgres, py-PyGreSQL
For client access to PostgreSQL databases using the ruby & python
languages.
p5-postgresql-plperl, postgresql-pltcl & postgresql-plruby
For using perl5, tcl & ruby as procedural languages.
postgresql-contrib
Lots of contributed utilities, postgresql functions and
datatypes. There you find autovacuum, pgcrypto and many other cool
things.
etc...
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