Started by Jeroen, this project grew to be a much used project to improve Magento search. During development, I jumped in to develop some features and make some improvements.
Replaces the core "recently viewed functionality" with a js implementation. Leverages localstorage (or sessionstorage if localstorage is not available). Is configurable per scopelevel.
This extension was intended to remove the necessity of a call to the server for each product page when using varnish. This avoids unnecessary hole punches.