Search Engines

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

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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: 314 This Week
    Last Update:
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  • 2
    Hunspell is a spell checker and morphological analyzer library and program designed for languages with rich morphology and complex compounding or character encoding. Hunspell interfaces: Curses, Ispell compatible pipe interface, OpenOffice.org UNO module
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    Downloads: 309 This Week
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  • 3
    CLucene is a C++ port of Lucene: the high-performance, full-featured text search engine written in Java. CLucene is faster than lucene as it is written in C++.
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    Downloads: 125 This Week
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  • 4
    SpiderFoot

    SpiderFoot

    Open Source Intelligence Automation.

    SpiderFoot is an open source intelligence automation tool. Its goal is to automate the process of gathering intelligence about a given target, which may be an IP address, domain name, hostname or network subnet. SpiderFoot can be used offensively, i.e. as part of a black-box penetration test to gather information about the target or defensively to identify what information your organisation is freely providing for attackers to use against you.
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    Downloads: 337 This Week
    Last Update:
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  • 5
    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: 475 This Week
    Last Update:
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  • 6
    Virtuoso is a scalable cross-platform server that combines Relational, Graph, and Document Data Management with Web Application Server and Web Services Platform functionality.
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    Downloads: 64 This Week
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  • 7
    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: 59 This Week
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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: 45 This Week
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  • 9
    Orphne is a highly specialized web browser, optimized for viewing "adult" content. Features include tagging, rating, and bookmarking sites, an integrated search, and slide shows. Please note that orphne is intended for adults only.
    Downloads: 66 This Week
    Last Update:
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  • 10
    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: 27 This Week
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  • 11
    Torrent Search
    Torrent Search is a cross-platform application, allowing to search for torrent files on different websites. Supported websites are integrated through plugins, which allows to easily extend the number of websites supported.
    Downloads: 18 This Week
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  • 12
    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: 16 This Week
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  • 13
    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: 12 This Week
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  • 14
    MemFree

    MemFree

    Hybrid AI Search Engine & AI Page Generator

    memfree is an open source hybrid AI search engine and page generation platform designed to help users retrieve information from both personal knowledge bases and the public web through a unified interface. The project combines retrieval-augmented search with AI summarization to deliver concise answers instead of forcing users to manually sift through multiple sources. It supports multiple AI models and search providers, enabling flexible configuration depending on cost, performance, or privacy requirements. Beyond search, memfree includes an AI Page Generator that can transform text or images into production-ready frontend code using modern web stacks. The platform emphasizes productivity by automatically organizing information and reducing the need for manual bookmarking or note management. Overall, memfree positions itself as an all-in-one knowledge assistant and rapid UI generation tool for developers and power users.
    Downloads: 2 This Week
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  • 15
    A torrent search engine plugin for the Azureus/Vuze bittorrent platform.
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    Downloads: 29 This Week
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  • 16
    The ht://Dig system is a complete indexing and searching system for a domain or intranet. This system is not meant to replace the need for powerful internet-wide search systems like Lycos, Infoseek, Google and AltaVista.
    Downloads: 15 This Week
    Last Update:
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  • 17
    AutoIndex is a PHP script that makes a table that lists the files in a directory, and lets users access the files and subdirectories. It includes searching, icons for each file type, an admin panel, uploads, access logging, file descriptions, and more.
    Downloads: 7 This Week
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  • 18
    The stuff here has no documentation and some of it may never be completed. This is my playground, use at your own risk.
    Downloads: 5 This Week
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  • 19
    OpenWebSpider
    OpenWebSpider is an Open Source multi-threaded Web Spider (robot, crawler) and search engine with a lot of interesting features!
    Downloads: 7 This Week
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  • 20
    ReHash is an easy-to-use console-based hash calculation tool written in C++. It supports many algorithms and output formats and it can be fully configured using some of the many command-line arguments which can be passed to the tool.
    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: 3 This Week
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  • 22
    LXR Cross Referencer
    A general purpose source code indexer and cross-referencer that provides web-based browsing of source code with links to the definition and usage of any identifier. Supports multiple languages. Up-to-date information in http://lxr.sourceforge.net
    Downloads: 2 This Week
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  • 23
    Vodcatcher Helper is a proxy server for media centers. It parses web pages for videos and provides them to the media center software. Supported media center softwares are VDR and XBMC.
    Downloads: 11 This Week
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  • 24
    Bookmark-Manager is an advanced bookmark management utility for Windows supporting importing/exporting and merging of Internet Explorer favorites, Opera hotlists, Mozilla, Netscape, and Firefox bookmarks, XBEL, and HTML lists.
    Downloads: 5 This Week
    Last Update:
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  • 25
    Xaraya

    Xaraya

    Xaraya is a web application framework and CMS written in PHP.

    Xaraya is an Open Source web application framework and content management solution written in PHP and licensed under the GNU General Public License. Xaraya is extensible, uses robust permissions, and multilingual systems to dynamically manage content. Track and get the latest developments on GitHub: https://github.com/xaraya
    Downloads: 5 This Week
    Last Update:
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