ASTAware SearchKey PRO
   Indexing, search and retrieval of data residing on Internet and intranet servers, with support for multiple file formats and european languages. Together with ASTAware SearchDisc, offers a comprehensive solution for simultaneous online and CD searching.
   http://www.astaware.com/new_pro.html

Alkaline Search Engine
   An Internet/intranet search engine, free for non-commercial sites and available for Windows NT, Linux, Solaris, IRIX, FreeBSDI and BSDI. By Vestris Inc.
   http://alkaline.vestris.com/

Atrise Everyfind
   Design a search engine for your web site, intranet, CD, DVD or any portable documentation.
   http://www.atrise.com/everyfind/

CareerCast
   Develops web-based job and resume search software for career, newspaper and employer sites.
   http://www.careercast.com

Datalink linkSearch search engine software
   linkSearch is search engine software capable of indexing pdf-, office-, html- and flash-documents. Handles dynamic and static sites, intranets, local nets and is very easy to deploy.
   http://www.datalink.se/se/index.html?content=linksearch_en.html

Emerge
   NCSA Information Technologies' effort to build a new search infrastructure that addresses issues of scale and heterogeneity.
   http://emerge.ncsa.uiuc.edu/

Estraier
   A full-text search engine for Japanese or English text.
   http://estraier.sourceforge.net/

F3DSearch
   Software to make topic-specific searches by creating and maintaining a hybrid search engine-directory with a link-indexer.
   http://www.simiax.com/f3dsearch.html

Findmaan
   A search engine developed on MySQL and PHP, and distributed under the GPL.
   http://findmaan.sourceforge.net/

Fluid Dynamics Search Engine
   Written in Perl. Online-manageable with a web browser.
   http://www.xav.com/scripts/search/

Funnelback
   Enterprise search engine with advanced text and metadata capabilities.
   http://funnelback.com/

Google Search Solutions
   Hosted search options and a search hardware product.
   http://bizsolutions.google.com/services/

HITS web search
   Jon Kleinberg's method of searching the Web. Links to the Cornell researcher's extensive online publications list.
   http://www.news.cornell.edu/releases/April98/websearch.bs.html

Harvest
   Free GPL-licensed distributed search system to collect files of many different formats and make the information searchable using a web interface
   http://harvest.sourceforge.net/

Hosted Site Search
   FusionBot search engine, a remotely hosted search service.
   http://vertical-search.fusionbot.com

IB 2.0 WebCat
   IB 2.0 is the commercial "big brother" of the public Isearch package.
   http://www.bsn.com/Z39.50/WebCat.html

IBM Intelligent Miner
   Identifies and extracts business intelligence from your data assets.
   http://www.software.ibm.com/data/iminer/

InTEXT WebSearch
   Windows/Unix server search engine, includes natural-language querying and document summarization.
   http://intext.com/

Infoglide Software
   Similarity Search Engine finds similarities and relationships between data in databases.
   http://www.infoglide.com/

Inktomi Search Engine
   Service provides searching in hosted clusters for specific domains and web sites.
   http://www.inktomi.com/products/search/index.html

Innerprise
   Scalable search engine software for corporate web sites and intranets.
   http://www.innerprise.net

Java Search Engine
   Search engine written in Java supports XML, XSLT and EJB.
   http://www.me.lv/jse/

Kscripts Web Site Indexer Search
   Perl script indexes and allows Boolean searching. Suitable for indexing up to approximately 4,000 pages.
   http://kscripts.com

LinkSearch
   Search engine that makes use of hypertext links and paths to provide rankings. Open source project under the GPL.
   http://linksearch.sourceforge.net

Managing Gigabytes
   Book about indexing techniques and a software package that implements the algorithms.
   http://www.cs.waikato.ac.nz/~ihw/mg.html

MnoGoSearch
   Search engine software for Internet and Intranet sites. The index can be stored in any of the popular SQL Databases.
   http://www.mnogosearch.org/

Mondosoft
   Offers analytics tools to manage content based on behavior. Mondosoft site search engine, reporting and optimization for Web environments.
   http://www.mondosoft.com/

Namazu: a Full-Text Search Engine
   Namazu is a full-text search system. Not only does it work as a small or medium scale web search engine, but also as a personal search system for email or other files.
   http://www.namazu.org/

Open Objects Software
   Open Objects Software is the UK integrator for Inktomi Search Software.
   http://www.openobjects.com

Perlfect Search
   Free web site indexer and search engine suite. Includes automatic installation tool, meta tag searching, paginated results, relevance ranking and keyword weighting.
   http://www.perlfect.com/freescripts/search/

Portal Juice
   Provides backend search engine services to micro and vertical niche market portals.
   http://www.portaljuice.com/

RightHere.net
   Provides audio and Internet-based locator software services for banks, restaurants, retail outlets, and manufacturers.
   http://www.righthere.net

S.L.I. Systems Learning Search System
   A scalable search that learns from your users and adapts, provides search suggestions, and extensive reporting.
   http://www.sli-systems.com/

SWISH++
   Unix-based file indexing and searching engine based on SWISH-E. SWISH++ is a complete rewrite developed to circumvent difficulties with the SWISH-E package.
   http://swishplusplus.sourceforge.net/

SWISH-E
   Search engine for Unix and Windows NT that handles meta tags. Free and open-source under the GNU public license.
   http://sunsite.berkeley.edu/SWISH-E/

Search Engine
   Perl-based software that allows visitors to search your site.
   http://www.interactivetools.com/products/searchengine/

Simiax
   Provides tools to build and maintain portals.
   http://www.simiax.com/

Suntek Chinese Search Engine
   Chinese and English search engine for web sites and intranets. Available for embedding on CDs. Chinese-enabled content management system supports full text and field search in addition to workflow and publication management.
   http://www.suntek.com.hk

TeraText Database System
   Text management product for storing, indexing, retrieving and delivering documents or XML records (stored natively).
   http://www.teratext.com/get/page/browser/browser?category=Products/TeraText%20DBS

The Clever Project
   Incorporates several algorithms that make use of hyperlink structure for discovering information on the Web.
   http://www.almaden.ibm.com/cs/k53/clever.html

Thunderstone
   Provides SQL-based relational full-text retrieval, dynamic publishing, object management, and web-indexing software.
   http://www.thunderstone.com/

TxSearch
   Database indexing and searching. Integrates with IIS and Apache and supports ASP and PHP.
   http://pages.sbcglobal.net/wpilcher50/

Ultra Search
   Provides uniform search-and-locate capabilities over multiple repositories, multiple Oracle databases, IMAP mail servers, HTML documents on a web server, or files on disk.
   http://otn.oracle.com/products/ultrasearch/content.html

Verticrawl
   An Internet search engine and bot that craws web sites and intranets for multiple-format indexing.
   http://www.verticrawl.com/

Voltix
   A J2EE-based enterprise search solution. It can search through both structured and unstructured content including relational databases.
   http://www.voltix.com

WebGlimpse
   Finds information in a related web of pages. Collects and indexes pages based on traversal of links or subdirectories. Create a context-sensitive search by category by linking to relevant pages.
   http://webglimpse.net/

Webinator
   Web walking and indexing package to create a retrieval interface to collections of HTML documents. Free for up to 2,000 pages.
   http://www.thunderstone.com/webinator/

YourAmigo
   Search engine that uses a server-based agent to seek all URLs on a site, including dynamic pages from databases. Includes an function to keep searches current.
   http://www.youramigo.com

Zoom Search Engine
   Free search engine software for your web site or intranet, with documentation and no advertising or dependency on external sites. PHP or ASP is required for the search front-end.
   http://www.wrensoft.com/zoom/

dtSearch
   High-volume text search works with many file types. Features include hit highlighting, natural language, fuzzy, phonic, Boolean, proximity, field, numeric range.
   http://www.dtsearch.co.uk

focuseek searchbox
   High performance, multi platform full-text search engine, spiders web or intranet sites, or indexes data you feed to it. Easily scriptable via a SOAP/REST API. Also supports a variety of input formats.
   http://www.focuseek.com/

freeWAIS-sf FAQ
   Frequently Asked Questions [FAQ] with answers for freeWAIS, a text retrieval system.
   http://www.faqs.org/faqs/wais-faq/freeWAIS-sf/

ht://Dig
   A complete indexing and searching system for a small domain or intranet. Source code provided under the GPL.
   http://www.htdig.org/