Search Tools
80-20
Discovery - The only retrieval software that arranges information according to concepts rather than keywords or predefined category trees.
Retriever - A personal search product that delivers almost instant search of Microsoft® Outlook folders and local and network file systems.
A 14-day trial version of 80-20 Retriever can be downloaded
BRS/Search 
The key technology for several hundred university, corporate, and government library catalog systems including the University of Washington, University of Southern California, and the British Library.
Copernic ***
Basic - Internet Search Tool Free download
Aggregator- For corporate or vertical porta
EasyAsk
"Intelligently" interprets and optimizes keyword and natural language searches to deliver the most precise answers from any structured or unstructured data source
IB 2.0 WebCat
Open Source System
iPhrase
Interpreting, Retrieving, Presenting and Learning system
I-Search™
Multi-Language Search Engine 多國語文檢索系統
JXTA Search
Distributed search service for JXTA and Web content
mnoGoSearch for Windows
Open Source System. Russian version available. Trial version available for download
MPS Information Server
An Information Retrieval System supports a variety of access protocols
Muscat Discovery™ - Smartlogik
A concept-based search engine
Search Tools Index
A-Z Listings and product report for all platforms
Web Admin's Guide to Site Search Tools
WebFerret
Free ware version contains advertising
Pro version no advertising $29.95
XQEngine
XML Query Engine (XQEngine for short) is a full-text search engine component for XML. Free download for evaluation
Most General Search Engines Portals
offer web & site search service to websites
See Site Search for site search scripts and
remote hosting
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