Berkeley DB XML is a native XML database engine for use within your product. Made available as a C++ library with language bindings for Java, Perl, Python, PHP, and Tcl, it integrates directly into your application (it is not a standalone database server). It provides XQuery access into a database of document containers. XML documents are stored and indexed in their native format using Berkeley DB as the transactional database engine.
C-DynaLib is a Perl module that allows Perl programs to call C functions in dynamic libraries. It is useful for testing library functions, writing simple programs without the bother of XS, and generating C function pointers that call Perl code. If you have a C compiler that Perl supports, you will get better results by writing XSubs than by using this module.
The CDDB/CDDB_get Perl module gets the CDDB info for an audio CD. The included script was intended as a demo for CDDB_get, but over time it has gained powerful features like the ability to write to a database, offline mode, HTTP mode (including proxy), saving in standard XMCD format, and writing 'lame' commands.
CGI.pm uses objects to create Web fill-out forms on the fly and to parse their contents. Instead of remembering the syntax for HTML form elements, developers can just make a series of Perl function calls. An important fringe benefit of this is that the value of the previous query is used to initialize the form, so that the state of the form is preserved from invocation to invocation.
CGI::Application::Generator provides a means by which a CGI::Application-based module can be created from code, as opposed to being written by hand. This module is intended to create the shell of an application module, based on the specification you provide. It will not output a completely functional application without additional coding. It will, however, create the structural parts of your application common to all CGI::Application-based modules. This module is intended to ease the creation of new CGI::Application modules and to encourage standardization of CGI::Application coding styles.
CGI::Application::Plugin::RateLimit is a plugin for CGI::Application which provides protection against a user calling a runmode too frequently. A typical use-case might be a contact form that sends email. You'd like to allow your users to send you messages, but thousands of messages from a single user in a short period of time would be a problem.
CGI::ContactForm is a Perl module that generates a contact form for the Web and sends a message to a predestinated recipient. Unlike many form-to-mail programs, it's limited to this single purpose, but it allows you to set up a decently designed form with a minimum of effort. In other words, it's simple to use rather than flexible, even if there are quite a few customization possibilities.