Polipo - A small and fast caching web proxy (a web cache, an HTTP proxy, a proxy server).
NethServer - NethServer is an operating system for Linux enthusiasts, designed for small offices and medium...
ExaProxy - ExaProxy is a a high-performance non-caching proxy.
ClearOS - A very good alternative for Windows Server, for free
Privoxy - Privoxy helps users to protect their privacy.
OpenMediaVault - OpenMediaVault is the next generation network attached storage (NAS) solution based on Debian Linux.