Regain is a Java search engine based on Jakarta Lucene. It provides indexing and searching files for plenty of formats (HTML,XML,doc(x),xls(x),ppt(x),oo,PDF,RTF,mp3,mp4,Java). A TagLibrary eases integrating search results in your JSP based web page.
E-Xoops Digger is an advanced search engine for Xoops and E-Xoops. Features are content indexing (like pdf, doc, xls), display results by rank, limit to a certain module, results with text spnippet highlighted, fuzzy search, exact search....