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...

LocalSolr | GIS Search
LocalSolr is a port of the LocalLucene library to the Solr search server. LocalSolr offers geographical searching capabilities to your search engine.To customize local solr you simple need to alter a few configuration files.

Some parts of the Zend Framework are nice (Lucene specifically) and others just make me wonder why anyone would make that.

reading CIA dumps some cash into Apaches Lucene and Solr search projects http://ow.ly/15FZZ0

LINQ to Lucene - Home
Providing a custom LINQ solution for the Lucene Information Retrieval System, commonly referred to as a search-engine.

Cedric Champeau's Weblog : Weblog
lucene的一些缺点： . No built-in support for clustering. Span queries are slow. Scoring is not really pluggable. A closed API which makes extending Lucene a pain. Lucene search algorithms are not adapted to grid computing.

Apache Lucene - Overview
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 2.1研究：文件存储 - Easy Net (Lucene && SOA) - BlogJava
文件名称 后缀名称 说明 segments_N 段，表示一个完整独立的索引；N为36进制数 segments .gen segments辅助文件，主要用来生成计数 SegmentName .fnm ...

lucene中的filter器群组及其缓存大盘点 - edwardpro - JavaEye技术网站
new RemoteCachingWrapperFilter(new CachingWrapperFilter(new DuplicateFilter(key)))用 memcache 作 lucene 的 filter cacheQueryFilter 把query变成filter 进行 cache

InfoQ: Apache Solr：基于Lucene的高伸缩性企业搜索服务器
cache 部分可以参考

Ferret
Ruby implementation for Apache Lucene

LuceneFAQ - Lucene-java Wiki
This is the official Lucene FAQ.If you have a question about using Java Lucene, please do not add it directly to this FAQ. Join the [WWW] Java User mailing list and email your question there.Questions should only be added to this Wiki page when they...

SimilarityDelegator (Lucene 2.4.1 API)
Delegating scoring implementation. Useful in Query.getSimilarity(Searcher) implementations, to override only certain methods of a Searcher's Similiarty implementation..See Also: Serialized Form

TermQuery (Lucene 2.4.1 API)
A Query that matches documents containing a term. This may be combined with other terms with a BooleanQuery.

org.apache.lucene.search (Lucene 2.4.1 API)
SearchSearch over indices. Applications usually call Searcher.search(Query) or Searcher.search(Query,Filter).Query ClassesTermQuery BooleanQuery - PhrasesRangeQueryPrefixQuery, WildcardQuery FuzzyQueryChanging SimilarityChanging Scoring —...

oclcsrwdspacelucene - Google Code
An SRW/SRU interface for DSpace