CAILogin is an image-based user verification program for Web page logins. It has no special dependencies, so it's suitable for embedded systems which lack "big" interpreted languages, such as PHP, Python, or Perl. It features a command line interface, which allows it to be very seamlessly integrated into shell scripts. It works by generating images of random numbers, on which it applies several obscuration filters. The end result is an image from which it is very difficult to extract the displayed number with current AI technologies.
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 is a Perl framework intended to make it easier to create sophisticated, reusable Web-based applications. This module implements a methodology which can make Web software easier to design, easier to document, easier to write, and easier to evolve. CGI::Application builds on standard, non-proprietary technologies and techniques, such as the Common Gateway Interface and Lincoln D. Stein's excellent CGI.pm module. CGI::Application judiciously avoids employing technologies and techniques which would bind a developer to any one set of tools, operating system, or Web server.
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.