ElasticSearch - Distributed, RESTful search and analytics engine

•    Java

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.

Lux - XML Search engine

•    Java

Lux is an open source XML search engine using Lucene /Solr and Saxon XQuery/XSLT processor. Lux provides XML-aware indexing, an XQuery 1.0 optimizer that rewrites queries to use the indexes, and a function library for interacting with Lucene via XQuery. These capabilities are tightly integrated with Solr, and leverage its application framework in order to deliver a REST service, application server, and supporting tools.

compass - Searchengine built on top of Lucene

•    Java

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

Lucene.Net - Lucene port in CSharp

•    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.

Solr/Lucene on Azure

•    Lucene

This project hosts Solr/Lucene in Windows Azure using multi-instance replication for index-serving and single-instance for index generation with a persistent index mounted in Azure storage. Typical scenarios could be a commercial and publisher sites that need to scale the traffic with increasing query volume and need to index maximum 16 TB of data and require couple of index updates per day.

Solr - Blazing-fast, open source enterprise search platform

•    Java

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.

Lucere - A .NET search engine based on Lucene

•    DotNet

Lucere is a .NET search engine based on the best-in-breed Java library Lucene. Lucere is a complete rewrite which is optimized for the .Net environment. It's developed in the C# programming language.

lucene-solr - Mirror of Apache Lucene + Solr

•    Java

Apache Lucene is a high-performance, full featured text search engine library written in Java.Apache Solr is an enterprise search platform written using Apache Lucene. Major features include full-text search, index replication and sharding, and result faceting and highlighting.

full-text search engine framework project based on lucene

•    DotNet

The purpose of this project is to develop a full-text search framework on top of lucene.

limo

•    Java

LIMO stands for Lucene Index Monitor. It is a web application that gives basic information about indexes used by the Lucene search engine (http://lucene.apache.org). It allows you to browse and search the index, and reconstruct stored fields.

Open Search Server

•    C++

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.

cassandra-lucene-index - Lucene based secondary indexes for Cassandra

•    Java

Cassandra Lucene index

Lucene desktop index

•    CSharp

A desktop search application based on the lucene index written in c# and .net 2.0 Features: Lucene index; Index common file types, network drives, outlook emails, sql server tables and, of course, Searching

Rosetta Engine

Rosetta is a full text engine entirely written in C++ with dotnet binding. It will provide same functionnaly than lucene with more flexibility, speed and scale up.

Lucene - A high-performance, full-featured text search engine library

•    Java

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.

Lucene Index Service

•    Java

Lucis provides a framework for building checkpoint-based index services on top of Lucene.

Katta - Lucene and more in the cloud.

•    Java

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.

Xapian - Search Engine Library

•    C++

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.

MG4J - Managing Gigabytes for Java

•    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.

search-index - A persistent, network resilient, full text search library for the browser and Node.js

•    Javascript

A persistent full text search engine for the browser and Node.js