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.
mldonkey.sourceforge.net
Open source, multi-platform, multi-protocol client. Includes support for eDonkey2000, Overnet, BitTorrent, Direct Connect and Fasttrack, and is written in Objective Caml.