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.
HTML-Tree is a Perl program that recursively decends directories, and creates a web-page based graphical map of HTML pages on a webserver. A configuration file provides control over the "root" directory for the map, map page title and header, directories to be excluded, link substitution strings, and map page background image. This mapper may be run as a cron task to provide an up-to-date roadmap of a webserver. It is primarily useful as a web site development and administration tool, since it shows all pages available to web browsers, and can identify where links are needed.
Flinch is a powerful and flexible Web link checker that will make your life as a Web designer or Web server admin easier. It can be used to check all the external links on your Web pages periodically and produce HTML reports of its findings. If a Web resource at the end of a link has not been reachable for a few days, Flinch can send you an email.
LinkController is a software package designed to make maintaining Web pages easier by checking links and providing easy and integrated interfaces for examining and repairing broken links. In contrast with the standard design of link checking software, LinkController is designed to check links over the long term and to minimize the work involved in dealing with those broken links.