From Technical Support, Xmultiple.

Features include: "Google-like" context descriptions, wildcard and exact phrase searching, spider & offline indexing, statistic reports, sort by date options, spelling suggestions, DOC/PDF/XLS/PPT files, and more. Visit our website and try it for yourself. Our search engine is available for PHP, ASP, or JavaScript platforms. Enjoy your Xmultiple website experience and please provide me feedback if there are features you would like us to add.