All Sites

» Arachnode.net

A .NET web crawler written in C# using SQL 2005 and Lucene. Documentation and online demonstration.

http://arachnode.net/

» Arch Search Engine : An open source corporate search engine

An open source, high precision corporate search engine based on Apache Nutch

http://www.atnf.csiro.au/computing/software/arch/

» BDDBot

A web robot, search engine and web server written in Java and available under GPL. Includes related resources. [Project no longer actively updated]

http://www.twmacinta.com/bddbot/

» DataparkSearch Engine Tool

Open source search engine tool released under GPL and designed to organize search within a website, group of websites, intranet or local system.

http://www.dataparksearch.org/

» Egothor

A cross-platform, full-featured text search engine written entirely in Java. It can be configured as a standalone engine, metasearcher, peer-to-peer HUB or used as a class library.

http://www.egothor.org/

» Groonga

An LGPL 2.1, open-source, fulltext search engine and column store written in C. Works with MySQL and Postgres. Site provides online documentation and downloads.

http://groonga.org/

» Grub

Open source, cross-platform distributed crawler. FAQ, documentation and a support forum.

http://sourceforge.net/projects/grub/

» Indri

A cross-platform search engine written in C++ that provides text search and a rich structured query language. BSD-like license.

http://www.lemurproject.org/indri.php

» KDE GUISearch

A tool for finding code by looking at the applications' GUI text messages (e.g., "Undo") and returning associated callbacks/slots (e.g., slotUndo()). Allows searching the KDE project CVS repository as a live demonstration.

http://guisearch.sourceforge.net/

» Locust

Specifically designed for knowledge area or corporate search, written in C++.

http://sourceforge.net/projects/locust/

» Nutch

Effort to implement a prototype of an open source web-search engine.

http://nutch.apache.org/

» Open Search Server

A GPLv3 search engine and crawler for urls, databases, and file systems. Comes with an XML/HTTP API, PHP/ASP client. Based on Apache Tomcat, Java Server Faces and JBoss RichFaces.

http://www.open-search-server.com/

» OpenWebSpider

An open source web spider and search engine. Includes demo, source code and screenshots.

http://www.openwebspider.org/

» Search Tools Listing: Open Source Search Engines

A listing of open source indexers, including links to related articles.

http://www.searchtools.com/tools/tools-opensource.html

» Sphider

A lightweight search engine in PHP. Includes details of features, documentation, support forum, and download. [GPL]

http://www.sphider.eu/

» Sphinx - Free open-source SQL full-text search engine

Sphinx is a search engine designed for indexing database content. It natively supports MySQL, PostgreSQL, and XML pipe interfaces. It is written in C++ and has a GPL license.

http://www.sphinxsearch.com/

» The Xapian Project

Open source search engine library written in C++, with bindings to allow use from other languages as well.

http://xapian.org/

» Wumpus

A C++, GPL-licensed search engine developed at the University of Waterloo. Wumpus allows control of the text unit retrieved based on structural constraints in the query.

http://www.wumpus-search.org/

» YaCy

A distributed Web crawler and caching HTTP/HTTPS proxy built on the principles of peer-to-peer (P2P) networks.

http://www.yacy.net/

» Yioop!

A PHP, GPLv3 search engine designed to do open web or intranet crawls.

http://www.seekquarry.com/