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Nutch - http://lucene.apache.org/nutch/
Effort to implement a prototype of an open source web-search engine. |
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Sphider - http://www.sphider.eu/
A lightweight search engine in PHP. Includes details of features, documentation, support forum, and download. [GPL] |
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Search Tools Listing: Open Source Search Engines - http://www.searchtools.com/tools/tools-opensource.html
A listing of open source indexers, including links to related articles. |
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Open Source Search - http://www.opensourcesearch.org/
Resources, ideas and news site for developing next generation open source search engines. Includes relevant source libraries and white papers. |
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DataparkSearch Engine Tool - http://www.dataparksearch.org/
Open source search engine tool released under GPL and designed to organize search within a website, group of websites, intranet or local system. |
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Egothor - http://www.egothor.org/
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. |
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KDE GUISearch - http://guisearch.sourceforge.net/
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. |
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BDDBot - http://www.twmacinta.com/bddbot/
A web robot, search engine and web server written in Java and available under GPL. Includes related resources. [Project no longer actively updated] |
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OpenWebSpider - http://www.openwebspider.org/
An open source web spider and search engine. Includes demo, source code and screenshots. |