Open Source Java Search Engines

Greenstone is a complete digital library creation, management and distribution package created and distributed by the New Zealand Digital Library Project. There are two major versions of the software. Greenstone 3 is under active development, and is recommended for download. We also provide maintenance releases for its forerunner, Greenstone 2. Featured download not what you're looking for? Click "Browse all files" to access binaries and source releases of both versions.

Elasticsearch is a distributed, RESTful search and analytics engine that lets you store, search and analyze with ease at scale. It lets you perform and combine many types of searches; it scales seamlessly, and offers answers incredibly fast with search results you can rank based on a variety of factors. Elasticsearch can be used for a wide variety of use cases, from maps and metrics to site search and workplace search, and with all data types.

Aperture is a Java framework for extracting and querying full-text content and metadata from various information systems (file systems, web sites, mail boxes, ...) and the file formats (documents, images, ...) occurring in these systems.

YaCy is a free search engine that anyone can use to build search the internet (www and ftp) or to create a search portal for others (internet or intranet). The scale of YaCy is limited only by the number of users and can index billions of web pages. In p2p mode it is fully decentralized, all users of the search engine network are equal and it is not possible for anyone to censor the content of the distributed index.

OpenSearchServer is a powerful, enterprise-class, search engine program. Using the web user interface, the crawlers (web, file, database, etc.) and the client libraries (REST/API , Ruby, Rails, Node.js, PHP, Perl) you will be able to integrate quickly and easily advanced full-text search capabilities in your application: Full-text with basic semantic, join queries, boolean queries, facet and filter, document (PDF, Office, etc.) indexation, web scrapping,etc. OpenSearchServer runs on Windows and Linux/Unix/BSD.

A universal platform for resource discovery and description that shares XML meta-data over existing peer-to-peer (P2P) networks such as Gnutella and JXTA.

Java program to extract postings and comments from http://www.livejournal.com (blog) into DB and view/classify/process it. LJ loader. Components to reuse: perl-like, but efficient Web pages scraper, trees analyzer, concurrent scheduler.

Narrows search result produced by popular Internet search engines, allowing to put extra filtering conditions, as certain words presented, certain words excluded, and so on.

SCAN (Smart Content Aggregation and Navigation) is a universal semantic content aggregator. It combines search, text analysis, tagging and metadata functions to provide new user experience of desktop navigation and document management.

Aracnis is a Java based framework for building distributed web spiders. These spiders can be used to accomplish a variety of tasks, for example, screen-scraping and link integrity checking.

AIS - Associative Indexing Service, an application for storing bookmarks, memos, indexing of big (lifetime) archives for fast future access to the data by (personalized) keywords. In other words - it is an extension of human associative memory :)

A tool which allows you to download all erotic images and videos hosted on popular image hosting sites tagged with a given tag without clicking you through the web interface. ,,java bayimg yourtag'' is enought.

Bookmark.inc is a PHP class that provides the essential functions to manage a bookmark. It provides an (multilingual) administrator interface, and allows the personalization of the bookmark visualization through a simple template system.

Contineo is a Web-based Document Management System (DMS). Features: Folder organization, document Versioning, Bulk import, import from mailbox. NOTE: this project has been DISMISSED in favor of LogicalDOC http://sourceforge.net/projects/logicaldoc

DVDWeb is a Web Service which provides organization/search/lookup services through JAX-RPC API. The search can be done against the builtin DB (the user\'s private list of DVDs according to UPC codes) or against other Internet sites such as imdb or yahoo.

With DoCASU, Alfresco users have a simplified and easy to use solution to access, search and manage documents. DoCASU is a Rich Internet Application (RIA) based on Alfresco Web Scripts and ExtJS. Find all details on: http://code.optaros.com/trac/docasu

Ex-Crawler is divided into 3 subprojects (Crawler Daemon, distributed gui Client, (web) search engine) which together provide a flexible and powerful search engine supporting distributed computing. More informations: http://ex-crawler.sourceforge.net

FTPSearch/Agent is a fully functional ftp indexing & searching engine for medium local networks (20-200 servers). Unique associative extend of searching allows you to garther much relevant results. FTPSearch/Agent is written in java and PHP and use MySQL

Indexes a set of files contained on many supports (directories, CDs, archives -such as zips, tarballs...-, ...) using several indexing methods (file name/date/length/CRC...) to detect dupplicates, find and trash old useless backups.

This package contains different tools to add NLP capabilities for Lucene 4.x (it has been tested using Lucene version from 4.6.x to 4.8.1). Although it was originally developed for German, it is, mostly, language independent. It allows the user to lemmatize words to be indexed, to weight termy ba their parts of speech (e.g. weighting nouns mor hevaily than pronouns), and to add synonyms taken from GermaNet or a list you provide to the search index and thereby increase recall of lucene.

Gumshoe Desktop Search indexes local files of various formats on a Windows desktop and provides a search GUI. The project is developed in Java. It builds on other opensource projects including Lucene, Luke, SWT, tagsoup, Jakarta POI and others.

Infinispan is an open source, Java based data grid platform. ***IMPORTANT*** Starting with Infinispan 5.0.0.FINAL, Infinispan releases are no longer hosted in Sourceforge. They can now be located in www.jboss.org/infinispan/downloads

Infofuze is a Java library and server application that can be used to transform and combine data from various sources into a specific XML or other text output format that can be stored or indexed.

The Java API search engine will allow users to search for Java classes that may be useful in the development of their current project

JeCARS (Java Extendable Contents And Rights System) is a RESTful webservice which delivers pluggable output formats, e.g. Atom feeds or HTML. Third party applications can be plugged in. A JCR (JSR-170) repository (Jackrabbit) is used for storage.