album is a free HTML/XHTML photo album and gallery generator that supports themes/skins. You can choose different themes or write your own to get different layouts and styles. It creates all your thumbnails (including directory thumbnails) and descends into directories so you can organize your photos. See the home page for more examples. album is also multi-lingual, with many languages being added all the time. N.B.: The purchase link is provided for donations; the software does not cost anything.
Aphid (the Apache/Perl HTTP Installation Daemon) provides a quick facility for compiling and installing the Apache Web server with support for SSL via mod_ssl, and with the embedded Perl interpreter provided by mod_perl. It downloads, compiles, and installs the software into the directory of your choice. Aphid places emphasis on providing an intuitive, browser-based interface and keeping a tiny distribution footprint. To date Aphid has been tested on Rehat Linux 6 and 6.2, FreeBSD 4.0, and Solaris 2.6 and 7.
Advanced Web Statistics (AWStats) is a free powerful Web server logfile analyzer (Perl script) that shows you all your Web statistics including visits, unique visitors, pages, hits, rush hours, search engines, keywords used to find your site, robots, broken links, and more. It works with both IIS 5.0+ and Apache Web server log files as a CGI and/or from the command line. It also supports around 40 languages.
bkmrkconv will convert Netscape's bookmarks.html file into a series of interconnected HTML pages which can be put online. The pages are heavily customizable and examples are included for a Yahoo-like portal. The program is useful for accessing your bookmarks from a remote machine or even just for making your links look prettier.
Cascade is a Web-based content management system. It's based around the idea of organizing resources into a hierachy of categories, much like Yahoo. Some features include generating static or dynamic HTML, allowing user comments on ratings on resources, design abstraction through templates, suggested addition and update management, an auto-generated "What's New" page, support for related categories and virtual subcategories, and more. It can use Postgres or MySQL as its SQL database.
Checklinks is yet Another HTML Link Checker (in Perl 5). Features include SSI (.shtml) support, direct file reads where possible, HTML 4.0, HTTP 1.1, and aliases and other server options. Other useful but more common features include regular expressions to restrict the URLs searched and results reported, and a detailed verbose report. Checklinks was written with Apache in mind, and you can feed it your srm.conf file to auto-configure many settings.