www.bahn.de Useful for pre-booking rail journeys - and there is an English option!
www.viamichelin.co.uk Useful for planning car routes
www.esterbauer.com For searching Bikeline route maps
www.stanfords.co.uk For searching and purchasing route maps
www.amazon.de For purchasing route maps
www.logis-de-france.fr Very useful for finding accommodation when travelling through France