net-proxy 3Proxy is really tiny cross-platform proxy servers set. It includes HTTP proxy with HTTPS and FTP support, SOCKSv4/SOCKSv4.5/SOCKSv5 proxy, POP3 proxy, FTP proxy, TCP and UDP portmappers. You can use every proxy as a standalone program (socks, proxy, tcppm, udppm, pop3p) or use combined program (3proxy). Combined proxy additionally supports features like access control, bandwidth limiting, limiting daily/weekly/monthly traffic amount, proxy chaining, log rotation, sylog and ODBC logging, etc. It's created to be small, simple (I'd like to say secure - but it's just a beta) and yet functional.