dtSearch

The dtSearch product line can instantly search terabytes of text across a desktop, network, and Internet or Intranet site. dtSearch products also serve as tools for publishing, with instant text searching, large document collections to Web sites or portable media. Developers can embed dtSearch's instant searching and file format support into their own applications. It supports MS Office through current versions (Word, Excel, PowerPoint, Access), OpenOffice, ZIP, HTML, XML/XSL, PDF and more. It supports Exchange, Outlook, Thunderbird and other popular email types, including nested and ZIP attachments.