Proxomitron is a powerful proxy server that can block much of the unwanted and dangerous content that unscrupulous and misguided webmasters would otherwise push onto your system. It allows a very fine grained customization of what appears on the web page. Unwanted headers can be changed or eliminated. Annoying javascripts can be rewritten on the fly to perform useful work.
Proxomitron, small but very flexible and powerful local HTTP web-filtering proxy. More information
