» BVG    Berlin transit system includes buses, underground, and tram lines. Site has point-to-point trip planner, route maps, fare information, history, and statistics. In English and German.    http://www.bvg.de/

» Public Transport and Traffic in Berlin    Guide to the city's tram, bus, underground, and commuter rail system, including timetables and links, as well as information on long-distance trains and airports serving Berlin. In English and German.    http://www.berliner-verkehr.de/

» VGF    Frankfurt transit system VGF (Verkehrsgesellschaft Frankfurt am Main) operates underground and surface rail lines, trams, and buses. Site has maps, schedule information (in German), a guide to routes serving points of interest in the city, and information    http://www.vgf-ffm.de/

» Verkehrsverbund Grossraum Nürnberg    Nuremberg's public transport system VGN operates bus, subway, and rail service. Schedule and fare information. [English and German]    http://www.vgn.de/