EchoVNC is a secure, "firewall-friendly" remote-desktop tool with support for VNC, Remote Desktop, and RAdmin servers and viewers. With it, a Windows PC or OSX Mac can be remotely accessed regardless of firewall, router or web-proxy configuration.
Online support is available here.
EchoVNC uses our echoWare technology to establish its connections. With echoWare, client-server and peer-to-peer Internet application can easily and securely connect with each other regardless of any intervening firewalls, routers, or web-proxies. EchoWare-enabled clients interconnect with each other via a server application called echoServer -- together with EchoVNC and InstantVNC (our "single-click", zero-install VNC Server) it's the basis of the EchoWare Remote Support System: a remote-desktop solution that is "firewall-friendly", highly secure, and extremely low cost.