Apache Solr - Solr is an open source enterprise search server based on Lucene search library, with XML/HTTP and...
Dejavu V3 - Web UI for Elasticsearch
ElasticSearch - Elasticsearch is an open source, distributed, RESTful search engine.
Searchkit - UI components for Elasticsearch
Algolia - Algolia's Search API makes it easy to deliver a great search experience in your apps & websites. Algolia Search provides hosted full-text, numerical, faceted and geolocalized search.
Deja vu - A mind-blowing interactive piece to promote an album. Wow.