Polipo - A small and fast caching web proxy (a web cache, an HTTP proxy, a proxy server).
CCProxy - Want to share Internet connection? Get every computer online through a single Internet connection?
dnsmasq - Dnsmasq is a lightweight, easy to configure DNS forwarder and DHCP server.
Apache Traffic Server - Fast, scalable and extensible HTTP/S 2 and 1.1 compliant caching proxy server.
Artica Proxy - Artica Proxy is an appliance that claim to manage Squid-cache proxy with all features that Squid...
3proxy - 3proxy freeware proxy server for Windows and Unix. HTTP, SOCKS, FTP, POP3