PeerBlock helps you surf the web in secret

PeerBlock is a free application that blocks off a selective host that is known to be serving spyware or advertisements that you do not appreciate. Personally, I think of this as a decidedly low-tech application, never mind if someone is frequently updating the list of blacklisted host addresses so that you don't have to. Bearing in mind that PeerBlock will also work against client software that attempts to report back on the sly, this could be a software you want to check out. Article