Indexing/Search

OpenSearchServer is built on Lucene and written in Java and it can be integrated into almost any kind of application without the need to produce Java code.

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Developer: Jaeksoft SarL
License: GNU General Public License version 3.0 (GPLv3)
Operating System: Macintosh, Linux, Windows

HouseSpider is an Java applet that adds indexing and search capability to your web site.

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Developer: Keith L. Jackson
License: GNU General Public License (GPL)
Operating System: Platform Independent

Apache Lucene is a high-performance, full-featured text search engine library written entirely in Java.

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Developer: zwchen
License: Apache Software License
Operating System: Not Available