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.
www.limesurvey.org
Explicit
Online web survey tool written in PHP using MySQL, MSSQL or Postgres database. Multilingual site with demo, feature list, documentation [Open Source, GPL3]