phpODP - Add the content of The Open Directory Project to site. Let search, browse the categories. Also support for targeted advertising. Site Search Pro - A fully-functional search engine for web site. Online demo. [Commercial] FlexPHPLink - A link management system allows to add, edit or delete links , easy internationalization, cheap customize service. [Freeware] phpLinks - A free link-farm, search engine script that uses MySQL. eDirectory - Application to manage online directories. Includes news, examples and FAQ. iSearch - A PHP/MySQL script for allowing visitors to a website to perform a search on the contents of the site. Includes multiple language support. [Free and Commercial] Softbiz Link Directory Script - Run own business link directory like dmoz. Customizable colors and graphics. Demo available. Softbiz Resource Repository Script - Run own software repository site like hotscripts. Customizable colors and graphics. Demo available. Softbiz Automatic Link Checker - Link validator tool written in PHP helps to check automatically if a page contain a link back to site. Helpful especially in link exchange or link popularity campaigns. ScriptRocket Top Site - Web Software for creating and run Top Sites. [Commercial] K-Links Directory - Professional link indexing solution. [Commercial] K-Search - Pay Per Click/MetaSearch script. [Commercial] GentleSource Link and Bookmark Manager - Link manager can be used as link section of a website or a personal bookmark manager. You can publish links/bookmarks or hide them behind a login. [Free for private usage and non-profit organizations] Aardvark Topsites PHP - A top sites script. [Open source, GPL] PHP Link Directory - Software for running a link exchange or professional directory sorted by categories. phpMyLinks - A Yahoo-style link-management script. Screenshots. Live demo. [Open source, GPL] PHP Links - Script that makes it easy to run a link portal. Includes support forum and demo. [Commercial] LinkBase - Web Software to manage links. Includes installation and demo. My Link Helper - Links manager software. Can be integrated into PHP page on your website. WSN Links - A fully templated searchable links portal. Option to auto-notify admin of submissions and submitter of approval via email. Users may rate, email, report, and comment on each link. [Free with crediting text in footer, or commercial] Link Up Gold - Features unlimited categories and links, rating system, mail lists, editor's pick, sponsors, and multiple languages.