From: http://www.mremoteng.org/

  mRemoteNG supports the following protocols:
  RDP (Remote Desktop/Terminal Server)
  VNC (Virtual Network Computing)
  ICA (Citrix Independent Computing Architecture)
  SSH (Secure Shell)
  Telnet (TELecommunication NETwork)
  HTTP/HTTPS (Hypertext Transfer Protocol)
  rlogin
  Raw Socket Connections