These libraries and development products allow programmers to create special-purpose search tools with custom capabilities for the specific data.
- Albert web
- Amberfish
- ASTAWare SearchKey API
- Apple Internet Access Toolkit (Sherlock
Find-by-Content) - no longer updated
- Coveo (formerly Copernic) (search & metasearch)
- Convera RetrievalWare
- CPL (PLS Callable Personal Library)
- Dieselpoint Search
- Doclinx TeraXML
- Elise Matching Engine
- Engenium Semetric
- Endeca Commerce, Catalog and Enterprise Search
- eVe Image Search
- dtSearch
- IBM Intelligent Miner for Text
- Intelliseek Enterprise Search
- i-phrase
- Inxight
- Isys:web
- IXE: Ideare indeXing Engine
- JXTA Search
- K2 Verity (now Autonomy)
- LexiQuest LexiGuide language processor
- linkSearch
- Lucene
- MetaStar
- Nav4
- Netrics Search (previously LikeIt)
- Noviforum (formerly
Trident)
- NQL
- OmniFind from IBM and Yahoo
- Onix (was Findex)
- orenge (empolis)
- Panoptic Search
- RetrievalWare
- SearchExpress
- SharePoint
(Microsoft Tahoe)
- Siderean Seamark Faceted Metadata Search
(formerly bpAllen Teapot)
- Solr
- Sphinx
- Subject Search Server (SSServer)
- t.find (Eidetica)
- Thunderstone Webinator/Texis
- Ultraseek Search XPA (Verity, previously by Infoseek, then Inktomi)
- Universal Knowledge Processor
(faceted metadata browse and search)
- Verity K2 Developer Toolkits
- Vivisimo Search, Clustering and MetaSearch Engines
- Xapian (previously OmSearch and Open Muscat)
- XML Query Engine
- YourAmigo
- Zebra (free, mainly Z39.50 server)
