Added debug information to Simple Search to assist in set up. Also added a hit counter and a 'no results found' page, + an @ignore array, so you can ignore certain directories from the search.
Speed Search is an amazing Perl script you can plugin to your web site allowing your visitors to search your entire site or specified folders. Speed search comes with a feature rich admin section with options and settings that allow you to speed up searches on large sites.
Glimpse is a fast engine for indexing and searching text files on a Unix system. Webglimpse is the spider and manager for the files to be searched. In combination, they can work to index and search your own "corner" of the web, defined by the links you place on a starting page.
WebSearch allows users to search for key words in documents located on your Web site. It searches the basic text of the documents, as well as ALT text and any information contained in META "keywords" and "description" tags. The script scores the match URLs based upon the frequency with which the requested key terms appear in the documents, and also lists the date on which each file was last modified. You can easily configure the number of matches which will be displayed on each results page.