Software by LaBordei.com:

This project aims at creating a Mesh layer for WiFi Ad-Hoc networks, thus making the network infrastructure be implicitly maintained by the users themselves. Unlike other solutions that allow mesh topology only between access points, this software puts it diretly on client nodes. Given that it's based on WiFi's Ad-Hoc mode of operation, users don't need any access points at all to build and maintain their network!