HTML::Mason is a full-featured web site development and delivery system. Mason allows web pages and sites to be constructed from shared, reusable building blocks called components. Components contain a mix of Perl and HTML, and can call each other and pass values back and forth like subroutines. Components increase modularity and eliminate repetitive work. HTML::Mason is most powerful when used in conjunction with mod_perl, but can be used in standalone applications as well.
John the Ripper is a fast password cracker, currently available for many flavors of Unix, Windows, DOS, BeOS, and OpenVMS. Its primary purpose is to detect weak Unix passwords. It supports several crypt(3) password hash types commonly found on Unix systems, as well as Windows LM hashes. On top of this, lots of other hashes and ciphers are added in the community-enhanced version (-jumbo), and some are added in John the Ripper Pro.
Namazu is a full-text search system intended for easy use. Not only does it work as a small or medium scale Web search engine, but also as a personal search system for email or other files. Supported document types: HTML, Mail/News, MHonArc, RFC, TeX (with detex), man (with groff), Word (with wvWare), PDF (with pdftotext) and plain text.
Net::Z3950::SimpleServer is a Perl module which implements the server side of the Z39.50 (information retrieval) protocol. It hides the complexity of network exchanges, packet serialization, and session handling. You are required only to implement simple callbacks to support searching and record retrieval. It is the basis of the "Zoogle" project, which is a Z39.50 gateway to the Google web index.
XMLTV is a set of programs to obtain and process TV (tvguide) listings and manage your TV viewing. It stores the listings in an XML-based format and most of the programs are filters which read and/or write XML. It includes tools to obtain, sort, grep, print, and munge listings, and two end-user programs to plan a week's TV viewing.