X1 is free search software that indexes a defined storage device, say an external hard drive mirrored from the client site, and allows you to perform rapid keyword searches using boolean type operators. The results are displayed in an attached window as you change the keywords. X1 includes viewers for many file formats, including Outlook, Acrobat, and Word so you can view the contents of a file without having to own or open the underlying application. X1 was licensed by a major search engine and was included in a popular toolbar. But you can get it for free directly from the software developer.