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.
apophenia.sourceforge.net
Statistics library for C. Has functions on the same level as those of typical statistics packages (OLS, Probit, singular value decomposition, &c.) but doesn't tie users to an ad hoc language or environment.