Displaying 1 to 20 from 57 results

Usergrid - The BaaS Framework you run

Usergrid is an open-source Backend-as-a-Service (“BaaS” or “mBaaS”) composed of an integrated distributed NoSQL database, application layer and client tier with SDKs for developers looking to rapidly build web and/or mobile applications. It provides elementary services (user registration & management, data storage, file storage, queues) and retrieval features (full text search, geolocation search, joins) to power common app features.

IndexTank - 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.

Katta - Lucene and more in the cloud.

Katta is a scalable, failure tolerant, distributed, data storage for real time access. Katta serves large, replicated, indices as shards to serve high loads and very large data sets. These indices can be of different type. Currently implementations are available for Lucene and Hadoop mapfiles.


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.


Sphinix is free open-source SQL full-text search engine. How do you implement full-text search for that 10+ million row table, keep up with the load, and stay relevant? Sphinx is good at those kinds of riddles.


Compass is a real time searchengine. It is built on top of lucene. It is transactional, distributed, supports Spring MVC, integrates with Hibernate.


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.

Solr - 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.

ElasticSearch - 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.

Norconex 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.

Yioop - Open Source Search Engine Software

Yioop is an open source, PHP search engine capable of crawling, index, and providing search results for hundred of millions of pages on relatively low end hardware. It can index a variety of text formats HTML, RSS, PDF, RTF, DOC and images GIF, JPEG, PNG, etc. It can import data from ARC, WARC, Media-Wiki, Open Directory RDF. It is easily localized to many languages. It has built-in support for new feeds, discussion groups, blogs, and wikis. It also supports mixing indexes to create mash ups.

BaasBox - Backend for Mobile and Web Application

BaasBox is an Open Source project that aims to provide a backend for mobile and web apps. It helps to manage the content, A document belongs to a Collection. It can create, read, update and delete a document, provided user have access to it. Additional to that it has support for File management, Backup and Restore, API access control, User and Profile management and lot more.

Lucene.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.

Gigablast - Web and Enterprise search engine in C++

Gigablast is one of the remaining four search engines in the United States that maintains its own searchable index of over a billion pages. It is scalable to thousands of servers. Has scaled to over 12 billion web pages on over 200 servers. It supports Distributed web crawler, Document conversion, Automated data corruption detection and repair, Can cluster results from same site, Synonym search, Spell checker and lot more.

YaCy - Decentralized Web Search

YaCy (read "ya see") is a free distributed search engine, built on principles of peer-to-peer (P2P) networks. It is distributed on several hundred computers so-called YaCy-peers. Each YaCy-peer independently crawls through the Internet, analyzes and indexes found web pages, and stores indexing results in a common database which is shared with other YaCy-peers using principles of P2P networks.

Searchdaimon - Enterprise Search

Searchdaimon is an open source search engine for corporate data and websites. It comes with a powerful administrator interface and can index websites and several common enterprise systems like SharePoint, Exchange, SQL databases, Windows file shares etc. It also supports many data sources (e.g., Word, PDF, Excel) and the possibility of faceted search, attribute navigation and collection sorting.

Lemur - 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.

Terrier - 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.

MG4J - 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.

Whoosh - 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.