core: Lucene core library
analysis-common: Analyzers for indexing content in different languages and domains
analysis-icu: Analysis integration with ICU (International Components for Unicode)
analysis-kuromoji: Japanese Morphological Analyzer
analysis-morfologik: Analyzer for dictionary stemming, built-in Polish dictionary
analysis-nori: Korean Morphological Analyzer
analysis-opennlp: OpenNLP Library Integration
analysis-phonetic: Analyzer for indexing phonetic signatures (for sounds-alike search)
analysis-smartcn: Analyzer for indexing Chinese
analysis-stempel: Analyzer for indexing Polish
backward-codecs: Codecs for older versions of Lucene
benchmark: Lucene benchmarking module
classification: Classification module for Lucene
codecs: Lucene codecs and postings formats
demo: Simple example code for Apache Lucene
expressions: Dynamically computed values to sort/facet/search on based on a pluggable grammar
facet: Faceted indexing and search capabilities
grouping: Collectors for grouping search results
highlighter: Highlights search keywords in results
join: Index-time and Query-time joins for normalized content
memory: Single-document in-memory index implementation
misc: Index tools and other miscellaneous code
monitor: Reverse-search implementation for monitoring and classification
queries: Filters and Queries that add to core Lucene
queryparser: Query parsers and parsing framework
replicator: Lucene index files replication utility
sandbox: Various third party contributions and new ideas
spatial-extras: Geospatial search
spatial3d: 3D spatial planar geometry APIs
suggest: Auto-suggest and Spellchecking support
test-framework: Framework for testing Lucene-based applications

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