Browse free open source Java Search Engines and projects below. Use the toggles on the left to filter open source Java Search Engines by OS, license, language, programming language, and project status.

  • Connect with customers in one app Icon
    Connect with customers in one app

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    Easy-to-use online form builder for every business.

    Create online forms and publish them. Get an email for each response. Collect data.

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  • 1
    Hibernate

    Hibernate

    An object relational-mapping (ORM) library for Java

    The Hibernate projects offer a suite of powerful Java libraries to work with data. It is best known for Hibernate ORM, which provides relational persistence for Java models and is an implementation of the Jakarta Persistence specification. Hibernate projects do not consistently release binaries or documentation to SourceForge anymore. For up-to-date information, refer to the Hibernate website: * Hibernate ORM: https://hibernate.org/orm/ * Hibernate Validator: https://hibernate.org/validator/ * Hibernate Search: https://hibernate.org/search/ That website will also be updated with newer projects, such as Hibernate Reactive.
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    Downloads: 3,148 This Week
    Last Update:
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  • 2
    Elasticsearch

    Elasticsearch

    A Distributed RESTful Search Engine

    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.
    Downloads: 16 This Week
    Last Update:
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  • 3
    Greenstone

    Greenstone

    Digital Library Software

    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.
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    Downloads: 371 This Week
    Last Update:
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  • 4
    The Lemur Project

    The Lemur Project

    Search engine and data mining applications and ClueWeb datasets.

    The Lemur Project develops search engines, browser toolbars, text analysis tools, and data resources that support research and development of information retrieval and text mining software, including the Indri search engine in C++, the Galago search engine research framework in Java, the RankLib learning to rank library, ClueWeb09 and ClueWeb12 datasets and the Sifaka data mining application.
    Downloads: 25 This Week
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  • Find out just how much your login box can do for your customer | Auth0 Icon
    Find out just how much your login box can do for your customer | Auth0

    With over 53 social login options, you can fast-track the signup and login experience for users.

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  • 5
    OpenSearch

    OpenSearch

    Open source distributed and RESTful search engine

    OpenSearch is a distributed search and analytics engine based on Apache Lucene. After adding your data to OpenSearch, you can perform full-text searches on it with all of the features you might expect: search by field, search multiple indices, boost fields, rank results by score, sort results by field, and aggregate results. Unsurprisingly, people often use search engines like OpenSearch as the backend for a search application, think Wikipedia or an online store. It offers excellent performance and can scale up and down as the needs of the application grow or shrink. Its distributed design means that you interact with OpenSearch clusters. Each cluster is a collection of one or more nodes, servers that store your data and process search requests. You can run OpenSearch locally on a laptop, its system requirements are minimal, but you can also scale a single cluster to hundreds of powerful machines in a data center.
    Downloads: 4 This Week
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  • 6
    OpenSearchServer Search Engine

    OpenSearchServer Search Engine

    An open source search engine with RESTFul API and crawlers

    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.
    Downloads: 11 This Week
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  • 7
    Regain is a Java search engine based on Jakarta Lucene. It provides indexing and searching files for plenty of formats (HTML,XML,doc(x),xls(x),ppt(x),oo,PDF,RTF,mp3,mp4,Java). A TagLibrary eases integrating search results in your JSP based web page.
    Downloads: 10 This Week
    Last Update:
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  • 8
    PDFBox is a Java PDF Library. This project will allow access to all of the components in a PDF document. More PDF manipulation features will be added as the project matures. This ships with a utility to take a PDF document and output a text file.
    Downloads: 10 This Week
    Last Update:
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  • 9
    VDC has been superseded by DVN: https://sourceforge.net/projects/dvn/ ---- The Virtual Data Center project is building an operational, open-source, digital library to enable the sharing of quantitative research data, and the development of distribute
    Downloads: 44 This Week
    Last Update:
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  • 10
    ResCarta

    ResCarta

    Archive your personal history

    ResCarta Toolkit offers an open source solution to creating, storing, viewing, and searching digital collections. Applications in the toolkit let users create and edit metadata, convert data to open standard ResCarta format, index and host collections.
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    Downloads: 9 This Week
    Last Update:
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  • 11
    Geoportal Server
    Geoportal Server is a standards-based, open source product that enables discovery and use of geospatial resources including data and services.
    Downloads: 4 This Week
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  • 12
    YaCy Peer-to-Peer Search Engine

    YaCy Peer-to-Peer Search Engine

    Decentralized Web Search Engine

    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.
    Downloads: 5 This Week
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  • 13
    A torrent search engine plugin for the Azureus/Vuze bittorrent platform.
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    Downloads: 19 This Week
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  • 14
    Online news and newspaper harvester - Like RSS Newsreader w/ database. National & International News. Very detailed catches hard to find news articles. Allows resposting of summaries w/ comments to Usenet Newsgroups, complex searches & more.
    Downloads: 19 This Week
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  • 15
    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
    Downloads: 8 This Week
    Last Update:
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  • 16
    iVia is an Internet subject portal or virtual library system. As a hybrid expert and machine built collection creation and management system, resources can be crawled and metadata and selected full-text can be automatically generated/extracted.
    Downloads: 12 This Week
    Last Update:
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  • 17
    TouchGraph provides a set of interfaces for graph visualization using force-based layout and focus+context techniques. For now only older code is available, but we are planning to release new versions as well.
    Downloads: 2 This Week
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  • 18
    webExtractor is a Java application that is used for extracting specific content from web based HTML, XML, CSV, and free form text. The extracted data can be used for data gathering and mining purposes.
    Downloads: 10 This Week
    Last Update:
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  • 19
    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.
    Downloads: 2 This Week
    Last Update:
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  • 20
    Group-CCS development Components, templates, tools, accessories, tutorial, modules, translations, documentation, codes, scripts, everything that can improve the work of who uses the powerful tool of development, CCS - CodeCharge Studio.
    Downloads: 5 This Week
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  • 21
    WebHarvest - web data extraction tool
    Web data extraction (web data mining, web scraping) tool. It leverages well proved XML and text processing techologies in order to easely extract useful data from arbitrary web pages.
    Downloads: 2 This Week
    Last Update:
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  • 22
    This is an ***old archive*** of tools developed for facilitating the use of Creative Commons licenses and metadata. --- For the most up to date representation of any of the projects listed here, please see: http://creativecommons.org/project/Developer.
    Downloads: 7 This Week
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  • 23
    Hyper Estraier is a full-text search system. It works as with Google, but based on peer-to-peer architecture. Using Hyper Estraier, we can construct a large-scaled search engine with cheap computers.
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    Downloads: 5 This Week
    Last Update:
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  • 24
    Simple Porn Downloader is a tiny all Java based application that uses a list of keywords and starting urls to crawl webpages and branch out searching for specific media extensions which are downloaded and presented in an html page.
    Downloads: 5 This Week
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  • 25
    Large Knowledge Collider
    This is the official collaborative development environment of the Large Knowledge Collider (LarKC), a platform for massive distributed reasoning that aims to remove the scalability barriers of currently existing reasoning systems for the Semantic Web
    Downloads: 1 This Week
    Last Update:
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