Fast Meta Search Engine  

This is a search engine that queries simultaneously several other search engines and returns their top results.

Hosting Requirements: PHP 4.2+
Database: Windows, Linux, SunOS
Price: $179

   IndexServer  

The strength of this package is to index all sorts of things (websites, file systems, files, databases tables, ...). You feed the indexer with information, and later you can query it. Features: Boolean search operators - Search for "fixed names" - Stemming, metaphone, soundex, fast part-word searches like foo*, foo*bar AND *foo - Good weightening - Foreign keys - Stopword lists - Settings via xml - For db's: auto-calculated settings from name conventions and table structures - Returns hints "Did you mean xy" after a search - Automatic creation of the internal (MySQL) database tables - Highlighting of the matched words in the results.

Price: ?

   TailSearch  

TailSearch is a simple meta script that grabs detailed aircraft and owner information from FAA's Aircraft Registry, based on an aircraft's tail number. The script will return information such as an aircraft's make, model, year, engine type, etc, and owner's name, address, phone number, etc.

Hosting Requirements: PHP 4
Price: Free (GPL)

   SmartPPC Search Engine  

The script was designed using modern technologies; PHP, MySQL, XML. SmartPPC SE uses PHP and MySQL to keep advertiser/affiliate data, listings, full statistics, payment history, status, settings etc. XML was used for communication with others Pay Per Click search engines. SmartPPC SE supports 29 external XML feeds.

Hosting Requirements: PHP
Database: MySQL
Price: $250

   W3Matter Meta Search Engine  

This quick and easy to use meta search engine program efficiently retrieves results from multiple search engines to present to your visitors, and works with almost any web hosting account.

Hosting Requirements: Unix/Linux, Windows; PHP 4.2+
Price: $39.95

   SQL Query Parser PHP Edition  

Search Engine Script, which parsers input keywords and creates a MySQL LIKE search statement. Supports the Altavista / Google syntax, uses the "+", "-", "

Hosting Requirements: Unix, Win NT; PHP
Database: MySQL
Price: $225

   CBSeeker  

This powerful software gives you the ability to have the entire ClickBank® Marketplace Directory on your site.

Hosting Requirements: PHP
Database: MySQL
Price: $29

   Smart Fetch  

Php based search engine - requires no database, stores data in a text file, no configuration is needed.You can also choose how many results to display per page.

Price: Free

   PHP Search  

Frontend for the ht://Dig search engine.

Price: Free (GPL)

   HTML files finder  

http://obiewebsite.sourceforge.net/obie.php?HTML_files_finder

Hosting Requirements: PHP
Price: Free