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.
smarth.sourceforge.net
An equation editor for MathML and LaTeX built on open Web standards using a SVG interface, implemented in ECMAScript. MathML, LaTeX and SVG exports. Open-source.