The Esperanto
Koresponda Servo (Pen-Pal Service) is an online service to help speakers of the
Esperanto language connect to other Esperanto speakers throughout the world. Anyone can list their name, location, Esperanto ability and other details. If you don't want to be listed, you can still write someone already on the list.
Esperanto Koresponda Servo: http://members.aol.com/enrike/ekseo.htm