The Compass Framework is a first class open source Java framework, enabling the power of
Search Engine semantics to your application stack decoratively.
Enhydra Snapper - Fulltext Indexing and Search
Hibernate Search brings the power of full text search engines to the persistence domain model
and Hibernate experience, through transparent configuration
(Hibernate Annotations) and a common API.
Might be here now… http://www.hibernate.org/410.html
Hibernate Annotations includes a package of annotations that allows you to mark any
domain model object as indexable and have Hibernate maintain a Lucene index of any
instances persisted via Hibernate.
Kowari is an Open Source, massively scalable, transaction-safe, purpose-built database
for the storage, retrieval and analysis of metadata.
DBSight is a highly customisable full-text search platform for any relational
NetSearch - the Enterprise Search Solution from Ardentia
Solr is an open source enterprise search server based on the Lucene Java search
library, with XML/HTTP APIs, caching, replication, and a web administration
LIUS is an indexing Java framework based on the Jakarta Lucene project.
The LIUS framework indexes : MsWord, MsExcel, MsPowerPoint, RTF, PDF, XML, HTML,
TXT, OpenOffice suite, ZIP files, MP3, VCard, Latex and JavaBeans.
Tika, a generic document parsing framework