VideoSearchScript is a content indexing script. It uses RSS feeds to index content such as videos, games, images, etc. The script includes a clean layout which is easy to customize. The script uses PHP and a MySQL backbone.   Code: PHP 4.0

Robots.txt Generator lets you browse through your server’s directory structure. The robots.txt file sets permissions for indexing activities. Additionally the script warns the user, if no index-files or htaccess files were found.   Code: PHP 4.0

Sphider is a lightweight yet powerful PHP search/indexing tool with multiple term support, directory generation, link detection, spidering pause/resuming, AND/OR support, "did you mean" suggestion, context sensitive searches, word stemming, and much more.   Code: PHP 4.0

GovLinks is a PHP script that enables you to get search results from the millions of pages on U.S. government websites to create a resource center for government links. Provide a resource for visitors to search within the governments public domain.   Code: PHP 4.0