Projects

Apache Lucene

claimed by Apache Software Foundation

Apache Lucene is an information retrieval API originally implemented in Java. It is a technology suitable for nearly any application that requires full-text search, especially cross-platform. Lucene has been ported to other programming languages including Perl, C#, C++, Python, Ruby and PHP.

Lucene.Net

claimed by Apache Software Foundation

Lucene.Net is a source code, class-per-class, API-per-API and algorithmatic port of the Java Lucene search engine to the C# and .NET platform utilizing Microsoft .NET Framework.

Beagle

Beagle is a desktop-independent service for indexing and searching your data. The Beagle daemon transparently monitors your data and updates the index to reflect any changes. On an inotify-enabled system, these updates (e.g. new files, emails, chat) happen more-or-less in real time. Beagle ... [More] supports many different file formats and can index files/email/browsing history/chat logs/RSS feeds etc. [Less]

Tracker

Tracker is a first class object database, extensible tag/metadata database, search tool and indexer. It can trawl through your hard drive and index existing files and data stores It has been designed from the ground up to be very lightweight (the tracker daemon consumes ~4MB of RAM in typical ... [More] use) yet at the same time very fast too. It provides a comprehensive, persistent and extensible storage system that can store and index almost any object. These objects can also have extensible user defined metadata and tags to create rich first class objects. [Less]

Sphinx Search

Sphinx is a full-text search engine, it's a standalone search engine, meant to provide fast, size-efficient and relevant full-text search functions to other applications. Sphinx was specially designed to integrate well with SQL databases and scripting languages.

Xapian

Xapian is an Open Source Search Engine Library, released under the GPL. It's written in C++, with bindings to allow use from Perl, Python, PHP, Java, Tcl, C#, and Ruby (so far!) Xapian is a highly adaptable toolkit which allows developers to easily add advanced indexing and search facilities ... [More] to their own applications. It supports the Probabilistic Information Retrieval model and also supports a rich set of boolean query operators. [Less]

Senna

Senna is an embeddable fulltext search engine, which you can use in conjunction with various scripting languages and databases. Senna is an inverted index based engine, and combines the best of n-gram indexing and word indexing to achieve fast, precise searches. While senna codebase is rather ... [More] compact it is scalable enough to handle large amounts of data and queries. [Less]

BlackRay Data Engine

BlackRay is a relational database system designed to offer performance features commonly associated with search engines. It offers SQL support and sophisticated operational and management features. Load-balancing and operational stability by means of N+1 redundance are included. BlackRay is ... [More] called a "Data Engine" since it combines traditional, relational database features and SQL with the power and flexibility of search engines. It is a true hybrid, offering transaction support, data-versioned snapshots, and sophisticated function-based indices. Wildcards, phonetic, and fuzzy logic searches are supported, as well. Commercial support is available, and the project is released under a the GPLv2 license. [Less]

dataparksearch

Key features: Support for http, https, ftp, nntp and news URL schemes. htdb virtual URL scheme for indexing SQL databases. Indexes text/html, text/xml, text/plain, audio/mpeg (MP3) and image/gif mime types natively. External parsers support for other document types, including Microsoft Word ... [More] , Excel, RTF, PowerPoint, Adobe Acrobat PDF and Flash. Can index multilingual sites using content negotiation. Searching all of the word forms using ispell affixes and dictionaries. Synonym, acronym and abbreviation query expansion based on editable dictionaries, specified by language and charset. Stop-words, synonyms and acronyms lists. Options to query with all words, all words near to each others, any words, or Boolean queries. A subset of VQL (Verity Query Language) is supported. Popularity Rank ba [Less]

OpenSearchServer

An open source full-text search engine and crawler based on best open source technologies: lucene, zkoss, tomcat, poi, pdfbox. Multilingual lemmatization, spellcheck, stop words, synonyms, facet, filters, web crawler, database crawler, local and remote file system crawler, documents indexation ... [More] with OCR, REST with XML or JSON and SOAP API. A stable, high-performance piece of software. It is a modern search engine and a suite of high-powered full text search algorithms. [Less]