Unicode Conversion Gateway is a web-based proxy server to convert some of the Indian language web pages encoded in proprietary encodings into Unicode.Padma, a popular Firefox extension, is extended and reimplemented in PHP to create this proxy server
Philtron is a proxomitron-like filtering HTTP proxy server writ entirely in PHP. Major design goals include removing unwanted/hostile content from web pages, better anonymity measures (HTTP headers control), user friendly, web-based configuration.