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.
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.
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.