Enterprise Search Consulting

출처 : Free, Open Source and Low Cost Engines

Open Source

Lucene / Nutch / Solr / Carrot^2
Geared towards programmers and techies.
lucene.apache.org/
lucene.apache.org/nutch/
lucene.apache.org/solr/
project.carrot2.org/

Hybrid: Open Source with Company Add Ons

Flax
www.flax.co.uk which is based on Xapian

Xapian
www.xapian.org

Tesuji
www.tesuji.eu

Smila
www.eclipse.org/smila
wiki.eclipse.org/SMILA

Free: Commercial

Free IBM/Yahoo Offering
"IBM OmniFind Yahoo! Edition" up to 500,000 documents, admin GUI, synonyms
omnifind.ibm.yahoo.net

Hosted

FreeFind
Year after year FreeFind provides a great service at a low price (though not free if you want to remove the ads). Consider it for small public sites; certainly not "search 2.0".
www.freefind.com

Google Free (Hosted)
Uses the index Google already has of public web sites.
www.google.com/faq_freewebsearch.html

---------------------------

우리나라에도 공짜(혹은 저가) 검색엔진이 있다.
KiSTi의 GIIS(Group for Intelligent Information Systems)에서 제공하는 KRISTAL 검색엔진이 그 주인공이며, 홈페이지에서 소스까지 다운로드가 가능하다.
기술협력업체를 통해 일정부분 기술지원을 받을 수도 있다.