Search Engines

Nutch - an open-source web search engine
Nutch is a nascent effort to implement an open-source web search engine. Web search is a basic requirement for internet navigation, yet the number of web search engines is decre...
Apache Lucene
Apache Lucene is a high-performance, full-featured text search engine library written entirely in Java. It is a technology suitable for nearly any application that requires full-te...
XQEngine - a full-text search engine for XML
XQEngine is a full-text search engine for XML documents. Utilizing XQuery as its front-end query language, it lets you interrogate collections of XML documents for boolean combinat...
Red-Piranha
Red-Piranha is an open source search system that can actually 'learn' what you are looking for. It lets you go everywhere , find anything , understand everything. Because it is op...
MG4J - Managing Gigabytes for
MG4J (Managing Gigabytes for Java) is a free full-text search engine for large document collections written in Java. As a by-product, it offers several general-purpose optimised cl...
Zilverline Search Engine
Zilverline is what you could call a 'Reverse Search Engine': Zilverline is a search engine that offers web access to your personal or intranet content. Zilverline is a 'Lucene D...
BDDBot - a web robot
BDDBot is a web robot, search engine, and web server written entirely in Java(TM). It was written by Tim Macinta for his book (co-authored with Wes Sonnenreich), a Web Developer's ...
Egothor - a text search engine
Egothor is an Open Source, high-performance, full-featured text search engine written entirely in Java. It is technology suitable for nearly any application that requires full-text...
Solr
Solr is an open source enterprise search server based on the Lucene Java search library, with XML/HTTP and JSON APIs, hit highlighting, faceted search, caching, replication, and a ...
Oxyus - an open source search engine
Oxyus is an open source search engine written in 100% Java, aimed to provide a search button to your website in an easy way. Oxyus uses Apache Lucene for indexing, Quartz for sched...