RE: A Comparison of Open Source Search Engines

From the website of Hounder:

How does Hounder compare to Lucene?
Lucene is a full text search library, intended to be a basic building block for applications needing text search functionality. Hounder, while it uses Lucene, is a search engine, providing all the required components to gather and find information with minimum extra coding, and often, no coding at all.

So it is like Solr or Nutch a “search server”/”framework” (or whatever) around Lucene.

Uwe