Subject Re: [firebird-support] Full Text Searching for Firebird 2?
Author Doug Chamberlin
I don't have any direct experience but from what I've heard about Lucene I
would look closely at anything that derives from it such as your third item.

Also, another source forge project, Mutis, is a Delphi port from the Lucene
code base. It is incomplete but I understand is functional.