Elasticsearch is an Open Source (Apache 2), Distributed, RESTful, Search Engine built on top of Lucene.
Elasticsearch is an Open Source under Apache 2 License, Distributed, RESTful, Search Engine built on top of Lucene and developed in JAVA
It provides a distributed, multitenant-capable full-text search engine with a RESTful web interface and schema-free JSON documents. It is also document oriented and presents a various set of APIs: Native JAVA, HTTP RESTful.
- Downloads: http://www.elasticsearch.org/download/
- Documentation: http://www.elasticsearch.org/guide/
- Source code: https://github.com/elasticsearch/elasticsearch
Also read on why a tag "elasticsearch" instead of "elastic-search" would save the world.