A PHP search engine for your website and web analytics tool. GNU GPL3
An Open Source "product catalogue" that is customizable and versatile.
An open source search engine with RESTFul API and crawlers
Very simple implementaition of list poisoning idea.
Small, fast and flexible Content Management System for PHP / MySQL
Group file share with advanced text parsing capability for easy search
Metasearch engine for P2P private torrent trackers.
Xaraya is a web application framework and CMS written in PHP.
advanced search for mediawiki
A database engine entirely in JavaScript (AJAX)