Tunnelizer is an application suite that allows you to tunnel TCP and UDP traffic through a firewall or proxy server. Tunnelizer Client End should be installed on a firewalled computer; it acts as a SOCKS V4/V5 proxy server for firewalled applications. Tunnelizer Server End should be installed on a computer with unrestricted access to the Internet. Communication between the two ends can be either direct or through a SOCKS or HTTP proxy server, and can be optionally encrypted.
Tunnelizer is free for both commercial and non-commercial use.
Operating system: Windows 2000, Windows XP, Windows Server 2003, and Windows Vista.
Download: Tunnelizer 0.92