adzapper is a filtering proxy that blocks ads from being downloaded and displayed by your web browser. Instead of ad banners, you see blank spaces: adzapper transforms the ads into transparent gifs. adzapper runs on Linux, Windows, and most Unix platforms and has a web-based user-interface. It is written with performance and flexibility in mind-- it's small and fast, and its filter rules are in XML-based site-specific files that are easy to make and easy to share.