Here is search logs of 650,000 AOL users. It's very interesting to view search history of particular person and analyze his personality. Let's do it together! Read more about AOL search database scandal or view research papers on web searching.
desktop.yahoo.com
Indexes files on desktop machine and allows searching via software interface. Results not ranked by relevance, but it uses reductive queries that means the list of results narrows as you add additional keywords. [Windows]