List of information retrieval libraries
# List of information retrieval libraries

This is a list of free information retrieval libraries, which are libraries used in software development for performing it retrieval functions. It is not a complete list of such libraries, but is instead a list of free information retrieval libraries with articles on Wikipedia. It does not include commercial software libraries.

## Libraries for searching and indexing

* Lemur
* Lucene
   * Solr
   * Elasticsearch
* Manatee
* Manticore search
* Sphinx
* Terrier Search Engine
* Xapian
