Surge for Mac - Advanced Web Debugging Proxy for Mac & iOS
Polipo - A small and fast caching web proxy (a web cache, an HTTP proxy, a proxy server).
Weer - A HTTP protocol debugger with Chrome DevTools frontend interface
Privoxy - Privoxy helps users to protect their privacy.
James - James is a HTTP Proxy and Monitor that enables developers to view and intercept requests made from...
ExaProxy - ExaProxy is a a high-performance non-caching proxy.