Apache Solr 4.3.1 released Juin 18 2013
Here is the link to download : http://www.apache.org/dyn/closer.cgi/lucene/solr/4.3.1
Solr is the popular, blazing fast, open source NoSQL search platform from the Apache Lucene project. Its major features include powerful full-text search, hit highlighting, faceted search, dynamic clustering, database integration, rich document (e.g., Word, PDF) handling, and geospatial search. Solr is highly scalable, providing fault tolerant distributed search and indexing, and powers the search and navigation features of many of the world's largest internet sites.