Free software to do a similar thing (Score 1)

This Freedom software sounds a bit like Crowds, available free for non-commercial use from AT&T Research. From the site:

The approach is based on the idea of "blending into a crowd", i.e., hiding one's actions within the actions of many others. To execute web transactions in this model, a user first joins a crowd of other users. The user's initial request to a web server is first passed to a random member of the crowd. That member can either submit the request directly to the end server or forward it to another randomly chosen member, and in the latter case the next member independently chooses to forward or submit the request.