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Lucene - A high-performance, full-featured text search engine library
Apache Lucene is a high-performance, full-featured text search engine library written entirely in Java. It is a technology suitable for nearly any application that requires full-text search, especially cross-platform.
search-engine searchengine full-text-searchSolr - Blazing-fast, open source enterprise search platform
Solr is the popular, blazing fast open source enterprise search platform from the Apache Lucene project. Its major features include powerful full-text search, hit highlighting, faceted search, dynamic clustering, database integration, and rich document (e.g., Word, PDF) handling. Solr is highly scalable, providing distributed search and index replication, and it powers the search and navigation features of many of the world's largest internet sites.
search-engine searchengine full-text-search facet distributed analyticsIndexTank - Search Engine powers Reddit
IndexTank search engine powers search in Reddit, Social bookmarking site. IndexTank is acquired by LinkedIn and released the project as open source. It includes features like Variables boosts, Facets, Faceted search, Snippeting, Custom scoring functions, Suggest, and Autocomplete.
search-engine searchengine full-text-search facet distributed linkedinElasticSearch - Distributed, RESTful search and analytics engine
Elasticsearch is a distributed, RESTful search and analytics engine capable of solving a growing number of use cases. As the heart of the Elastic Stack, it centrally stores your data so you can discover the expected and uncover the unexpected.
searchengine search-engine full-text-search document-oriented percolator analytics nosqlNorconex HTTP Collector - Enterprise Web Crawler
Norconex HTTP Collector is a full-featured web crawler (or spider) that can manipulate and store collected data into a repositoriy of your choice (e.g. a search engine). It very flexible, powerful, easy to extend, and portable.
crawler webcrawler spider full-text-search searchengine search-engineNutch - Highly extensible, highly scalable Web crawler
Nutch is open source web-search software. It builds on Lucene Java, adding web-specifics, such as a crawler, a link-graph database, parsers for HTML and other document formats, etc.
crawler webcrawler searchengine search-engine full-text-searchWhoosh - Python Search Library
Whoosh is a fast, featureful full-text indexing and searching library implemented in pure Python. Programmers can use it to easily add search functionality to their applications and websites. It has support of Fielded indexing, search, scoring, text analysis, storage, Pluggable scoring algorithm, Powerful query language and spell-checker.
search-engine searchengine full-text-searchXapian - Search Engine Library
Xapian is an Open Source Search Engine Library. It is written in C++, with bindings to allow use from Perl, Python, PHP, Java, Tcl, C# and Ruby. Xapian is a highly adaptable toolkit which allows developers to easily add advanced indexing and search facilities to their own applications. It supports the Probabilistic Information Retrieval model and also supports a rich set of boolean query operators.
searchengine search-engine full-text-search lucene-alternativeConstellio - Enterprise Search engine
Constellio Open Source Enterprise Search is based on Apache Solr and using Google Search Appliances connectors architecture, it allows, with a single click, to find all relevant content in your organization (Web, email, ECM, CRM etc.).
search-engine searchengine full-text-search enterprise-search enterpriseCLucene - Lucene C Port
CLucene is a port of the very popular Java Lucene text search engine API. CLucene aims to be a good alternative to Java Lucene when performance really matters or if you want to stick to good old C++. CLucene is faster than Lucene as it is written in C++, meaning it is being compiled into machine code, has no background GC operations, and requires no any extra setup procedures.
search-engine searchengine full-text-search lucene-portJumper - Collaborative search engine in PHP
Jumper 2.0 is a collaborative community search platform that revolutionizes search by crowdsourcing knowledge management powered by a shared bookmarking engine. It is easily and quickly deployed into a community of practice that benefits users with complex and specialized search requirements. Jumper delivers universal search of any databases, flat files, fileshares, content systems, web pages, blogs and wikis, even people - through one simple search box.
searchengine search-engine full-text-search collaborative community bookmarking-engineGrub
Grub Next Generation is distributed web crawling system (clients/servers) which helps to build and maintain index of the Web. It is client-server architecture where client crawls the web and updates the server. The peer-to-peer grubclient software crawls during computer idle time.
crawler webcrawler searchengine search-engine full-text-search spiderOpen Search Server
Open Search Server is both a modern crawler and search engine and a suite of high-powered full text search algorithms. Built using the best open source technologies like lucene, zkoss, tomcat, poi, tagsoup. Open Search Server is a stable, high-performance piece of software.
crawler webcrawler searchengine search-engine full-text-search spiderArachnode.net
An open source .NET web crawler written in C# using SQL 2005/2008. Arachnode.net is a complete and comprehensive .NET web crawler for downloading, indexing and storing Internet content including e-mail addresses, files, hyperlinks, images, and Web pages.
crawler webcrawler searchengine search-engine full-text-searchH2 Database - Java based Database Engine
H2 database is very fast, open source database engine. It supports SQL and JDBC standards. It can run in Embedded and Server mode and it has clustering support.
database cluster relational full-text-search embedded-database in-memoryCrate - The fast, scalable, easy to use SQL database with native full text search
Crate is an open source, highly scalable, shared-nothing distributed SQL database. Crate offers the scalability and performance of a modern No-SQL database with the power of Standard SQL. Crate’s distributed SQL query engine lets you use the same syntax that already exists in your applications or integrations, and have queries seamlessly executed across the crate cluster, including any aggregations, if needed.
sql distributed-sql database scalable distributed searchengine full-text-search analyticsLucene.Net - Lucene port in CSharp
ucene.Net is a port of the Lucene search engine library, written in C# and targeted at .NET runtime users. The Lucene search library is based on an inverted index.
lucene lucene-port search-engine full-text-searchLemur - Search Engine
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. The project is best known for its Indri search engine, Lemur Toolbar, and ClueWeb09 dataset.
searchengine search-engine full-text-search lucene-alternative search information-retrievalTerrier - Information Retrieval Platform
Terrier is a highly flexible, efficient, and effective open source search engine, readily deployable on large-scale collections of documents. Terrier implements state-of-the-art indexing and retrieval functionalities, and provides an ideal platform for the rapid development and evaluation of large-scale retrieval applications. Terrier can index large corpora of documents, and provides multiple indexing strategies, such as multi-pass, single-pass and large-scale MapReduce indexing.
searchengine search-engine full-text-search lucene-alternative search information-retrievalMG4J - Managing Gigabytes for Java
MG4J (Managing Gigabytes for Java) is a free full-text search engine for large document collections written in Java. MG4J is a highly customisable, high-performance, full-fledged search engine providing state-of-the-art features (such as BM25/BM25F scoring) and new research algorithms. The main points of MG4J are Powerful indexing, Multi-index interval semantics, Virtual fields, Clustering and lot more.
searchengine search-engine full-text-search lucene-alternative searchSocial Icons
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