DocSearcher is a search tool for indexing and searching files on a personal computer. It uses API's to provide search functionality for common document formats. currently: Word, Excel, PDF, Libre/Open/StarOffice, RTF, Text, and HTML
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.