Wikipedia
Lugro-Mesh
LUGRo-Mesh is a project that is being developed by LUGRo the Free Software Users Group of the city of Rosario, Santa Fe, Argentina. (Lugro stands for its Spanish name: Grupo de Usuarios de Software Libre de Rosario ) . The project is meant to provide free Internet access to the inhabitants of Rosario and its surroundings. It uses redundancy and is developed entirely on free software
As part of its name implies, it is based in using wireless LAN Mesh networking topology because it is one of the best ways of deploying a Wi-Fi Net in a city with a skyline that is composed by very big buildings and where redundancy and a rapid deployment are needed.