The satpass script provides satellite visibility predictions, given the position of the observer and the NORAD element sets for the desired satellites. It can acquire the NORAD element sets directly from any site supported by Astro::SpaceTrack. It can acquire the observer's latitude and longitude from http://geocoder.us/, look up star positions in the SIMBAD catalog, and more.
Mail::DeliveryStatus::BounceParser analyzes RFC822 bounce messages and returns a structured description of the addresses that bounced and the reason they bounced; it also returns information about the original returned message, including the Message-ID. It works best with RFC1892 delivery reports, but will gamely attempt to understand any bounce message no matter what MTA generated it.
HTML::FormFu is a framework for HTML forms. It aims to be as easy as possible to use for basic Web forms, but with the power and flexibility to do anything else you might want to do (as long as it involves forms). You can configure almost any part of formfu's behavior and output. By default, formfu renders "XHTML 1.0 Strict" compliant markup, with as little extra markup as possible, but with sufficient CSS class names to allow for a wide range of output styles to be generated by changing only the CSS.
KiokuDB is a frontend to various data stores. Its purpose is to provide persistence for "regular" objects with as little effort as possible, without sacrificing control over how persistence is actually done, especially for objects that are harder to serialize. KiokuDB is also non-invasive: it does not use ties, AUTOLOAD, proxy objects, sv_magic, or any other type of trickery. Many features important for proper Perl space semantics are supported, including shared data, circular structures, weak references, tied structures, etc.
AI::Prolog is a predicate logic engine implemented in pure Perl. In predicate logic, instead of telling the computer how to do something, you tell the computer what something is and let it figure out how to do it. Conceptually, this is similar to regular expressions. The AI::Prolog distribution contains a Prolog shell called aiprolog and two short adventure games, spider.pro and sleepy.pro.
Text::Xslate is a template engine, tuned for persistent applications, safe as an HTML generator, and with rich features. The concept of Xslate is sandboxing. The template logic should have no access outside the template beyond your permission. Templates are compiled into intermediate code and then executed by the virtual machine, which is highly optimized for rendering templates. Xslate supports template cascading, which allows you to extend templates with block modifiers.
CHI provides a unified caching API for Perl, designed to assist a developer in persisting data for a specified period of time. The CHI interface is implemented by driver classes that support fetching, storing, and clearing of data. Driver classes exist or will exist for the gamut of storage backends available to Perl, such as memory, plain files, memory mapped files, memcached, and DBI. CHI is intended as an evolution of DeWitt Clinton's Cache::Cache package, adhering to the basic Cache API but adding new features and addressing limitations in the Cache::Cache implementation.
Chart::Clicker aims to be a powerful, extensible charting Perl package that creates really pretty output. Charts can be saved in PNG, SVG, PDF, and PostScript format. Clicker leverages the power of Graphics::Primitive to create snazzy graphics without being tied to a specific backend.