Thanks to Randal Schwartz of Stonehenge Consulting for judging the contest, and O'Reilly and Whirlwind Interactive for providing prizes. I still haven't seen the prizes. FilterProxy is a generic http proxy with the capability to modify proxied content on the fly. It has a modular system of filters which can modify web pages any way you desire. The modular system means that many filters can be applied in succession to a web page, and configuration is easy and flexible.
All configuration is done via web-based forms , or editing a configuration file .
It was created to fix some of the annoyances of poor web design and incompatible software. It also can improve the web for you, in both speed in quality. Compare to Muffin in purpose and functionality. FilterProxy is written in perl, and is quite fast. Muffin is written in Java.