squid_redirect uses a list of patterns to zap annoying ad banners from Web pages, inserting a placeholder image. It lives in a Web proxy and so requires no special browser facilities. It's readily customizable, small, fast, and easy to install. (In Debian/Ubuntu, this program is named "adzapper".)
tree.pl creates a sitemap for all kinds of files (e.g., HTML and image files). It follows the directory structure on disk, creating a nested HTML list that contains the files' names or (in case of HTML) their titles, their last modified date, and their size. tree.pl can be used as a normal commandline application or as a CGI script.
Perlfect Search is a Web site indexing and searching CGI application. Features include full-text and meta tag indexing, keyword weighting, relevance-ranked searches, dir/file excludes, stopwords, boolean searches, and an automatic installation and configuration utility that works with most Web server setups. It works on both Linux/Unix and Windows.
HTML TIDY is a free utility to fix mistakes made while editing HTML and to automatically tidy up sloppy editing into nicely layed out markup. It also works great on the atrociously hard to read markup generated by specialized HTML editors and conversion tools, and can help you identify where you need to pay further attention on making your pages more accessible to people with disabilities.
journyx Timesheet is web timesheet software, written in python, that keeps track of hours worked on one or more projects. It is extremely customizable, has extensive reporting capabilities and supports multiple levels of user authority. The user interface for entering time can be easily configured to resemble existing paper timesheets. Individual time sheet entries can be subdivided into up to four categories (such as Project, Task, Activity). The server runs on Linux, FreeBSD, Solaris, AIX and Windows NT.
The phpCommunityCalendar (formerly known as Rosenet Community Calendar) is a full-featured, interactive community calendar. Since it runs on PHP and MySQL, it is much faster than existing "traditional" calendar applications. The visual layout has been left fairly generic, so modification for looks is very simple.
sitemapper.pl is a simple perl script which generated an HTML site map from a given URL. It does this by traversing the site, getting the home page, extracting links from it, getting all the pages linked, and so on. The default sitemap generated is an HTML bulleted list. The first level indented list item is the home page; the next level are all the pages linked from the home page. The next level are all the pages linked from each of these pages, and so on. If a page is linked from more than one page, it is shown in the "highest" place in the tree it is linked from.
Dead Link Check (DLC) is a Perl script designed to find information on validity of HTTP references. The script may use/generate a cache file for avoiding redoing network requests if the user wants to check added entries. The script works by reading entries from a file (or a list of links from the command line) and output results in file(s) (or STDOUT). DLC was created as an extension to Public Bookmark Generator (PBM), but can be used on its own.