proxy server HTTP, HTTPS, SOCKS v4/4a/5, FTP, UDP/TCP portmapping access control
3Proxy tiny free proxy server previously known as 3[APA3A] tiny freeware proxy (pronounce it as Zaraza tiny freeware proxy) is really tiny cross-platform (Win32/Win64&Unix) proxy servers set. It includes HTTP proxy with HTTPS and FTP support, SOCKSv4/SOCKSv4.5/SOCKSv5 proxy (socks/socks.exe), POP3 proxy, SMTP proxy, AIM/ICQ proxy (icqpr/icqpr.exe), MSN messenger / Live messenger proxy (msnpr/msnpr.exe), FTP proxy, caching DNS 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, syslog and ODBC logging, etc. Its created to be small, simple (Id like to say secure - but its constantly in development and beta testing stage) and yet very functional. It may be compiled with Visual C or gcc. Native Win32 version included in archive and supports installation as NT/2K/XP service. Currently 3proxy is tested to work under Windows 98/NT/2000/2003/XP/x64, FreeBSD/i386, NetBSD/i386, OpenBSD/i386, Linux/i386, Linux/PPC, Linux/Alpha, Mac OS X/PPC, Solaris 10/i386. See Release Notes and Changes for features list.
3proxy is absolutely free (FreeWare) and open source. It can be used under terms of GNU/GPL. Starting from 0.6 version BSD-style license is used and any compatible license (Apache license, GPL, LGPL) may be used instead. you can free download 3proxy 0.5.3k now.