pgMail is a small Tcl-based script that you can store within any PostgreSQL database. Once it is stored there, you can create any number of specialized procedures to send email from directly within PostgreSQL. For example, you can email a customer when product ships. It is particularily helpful in a heterogeneous systems environment, or when many different kinds of applications may modify one database.
pgdiff compares the structures of two PostgreSQL databases and returns the differences as a sequence of SQL commands which can be fed to psql to transform the structure of the first to be identical to the second (analagous to diff and patch). There is an advanced Web interface that makes testing and exploration easy. Database schemas can come from live databases, SQL files, or direct input.
pgintcl is a pure Tcl interface to the PostgreSQL database system. It provides an alternative to pgtcl and pgtcl-ng but does not require a compiled Tcl extension (libpgtcl) or PostgreSQL client library (libpq). This allows developers to create Tcl utilities and applications that are platform neutral. Trade-offs are slower performance and PostgreSQL protocol version dependency.
The pilot-link suite of tools contains a robust library and a series of conduits for moving information between your desktop or workstation and your Palm handheld device, such as those made by Palm, Sony, Handspring, Handera, and others. It also includes language bindings for languages such as Perl, Python, and Java.
pkgusage lists all the packages you have installed on your system, along with a number telling you how many days ago you last accessed any of the files in the package. This could be useful for cleaning out your hard drive. Pkgusage works with RPMs and Debian packages, and is written to be easily portable to other package managers as well.