What is Freifunk?
Freifunk is a project in which people like you and me build up a citywide wireless network. This network is supposed to enable open and free communication inside the whole city and with links to other cities, even trans-regional communication.
To achieve this, so called "Freifunkknoten"(nodes), routers with antennas similar to these which you may know form other wireless internet access points, are being operated by volunteers at many places in the city.
Every device that is wifi capable (for example a cell phone or notebook) can connect to the network and communicate with other clients when it is within reach of a node. Furthermore this network often provides access to the internet.
Everyone is invited to use or expand the network.