A Neutrino Factory based on a muon storage ring is perhaps the ultimate tool for studies of neutrino oscillations and possibly of leptonic CP violation and may open the way to muon colliders. Linear accelerators and their technologies are likely to play a dominant role in the complex of a Neutrino Factory. An overview of different scenarios worked on in the US, Japan and Europe will be presented. The basic layout of a Neutrino Factory consists of a high power proton driver, a high power target where pions are produced, which decay rapidly into muons. These muons are accelerated and fed into a storage ring producing a well-collimated neutrino beam by their decay. Emittance reduction ("cooling") of the muon beam is an important issue. A cooling experiment is therefore planned and some details will be discussed. Other ways for producing neutrino beams ("Super beams" and "Beta beams") will be briefly indicated
