Open Source Information Retrieval Systems

GalaTex XQuery Full-Text Search (XML query text search)
Lemur Language Modelling IR Toolkit
Lucene Apache Jakarta project
SMART Early IR engine from Cornell University
Terrier Information Retrieval Platform
Xapian Open source IR platform based on Muscat
Zettair
DIG Open source web crawling software
iHOP Information retrieval system for the biomedical domain
MG full-text retrieval system Now maintained by the Greenstone Digital Library Software Project
Information Storage and Retrieval Using Mumps

Mauro Cherubini